Unsent Letters 2026: Dear Correspondent

Greetings!

I'm trying something new this year: my general likes and DNWs for challenges and exchanges are in a master letter post here. What follows are prompts and notes on my specific requests for this exchange.

Crossover Fandom
Alexis Castle & Cassie Fraiser; Alexis Castle & Cassie Lang; Alexis Castle & Dairine Callahan; Cassie Fraiser & Cassie Lang, Kim Possible & Kamala Khan (Castle, Kim Possible, MCU, SG-1, Young Wizards)

All these fall under the general umbrella of "girls' night out" prompts - plain and simply, I'm intrigued by the potential mischief, adventures, or straight-up bonding that might happen if any of these duos were thrown together. Feel free to massage timelines to allow for these characters to be of similar age as they correspond or collaborate.

In particular, where Alexis is concerned, feel free to overlook the late-series efforts to turn her into a career PI; that seems to me inconsistent with the Alexis we've seen in high school and college, who's evidenced notable musical gifts and inherited her dad's literary skills, and I like the earlier Alexis much better. (That said, I'd also be fascinated to see Alexis as either a wizard-in-training or a player in the MCU....)

Kate Beckett & Elisa Maza (Castle, Gargoyles)

This one strikes me as an utterly natural match - two seasoned NYC police detectives, each with a highly unconventional sidekick. (While the primary documents should feature these two, I will totally not turn down input from Castle, Xanatos, Owen, or any other of the appropriate players - or their keepers' commentary on what happens when they get into each other's hair.)

Richard Castle & Jessica Fletcher (Castle, Murder She Wrote)

Fanon has long suggested that Jessica is Castle's aunt (even if the blood tie, as I once had Jessica remark, is a trifle complicated). That just about has to set up a long and entertaining correspondence...or perhaps we can get a look at what they have to say about each others' novels in the privacy of their own personal journals. [insert mischievous chuckle here]

Castle
Martha & Alexis; Beckett & Alexis; Beckett & Gates

One may correctly deduce from these and the crossover prompts above that I'm a particular fan of the Alexis Castle character - it's rare in my experience of prime time TV to find a teen character who's as intelligent, sensible, and relatively well-adjusted as she was. I also quite liked Martha, who also avoided falling into caricature; she came across as both realistically theatrical and theatrically realistic. And while I strongly disliked the plot twists that led to the 12th Precinct's change of leadership, Kate Beckett and Captain Gates were also generally well-written and ably portrayed.

For all three of these prompts, I'm hoping for more about the characters' offscreen lives - Martha's acting career, Alexis' academic and social interests, Beckett and Gates learning from one another off the clock. The less said about Pi, Hayley, and any or all of the absurd season-arc plots, the better; what made Castle a brilliant series was the character chemistry. Feel free to speculate on Alexis' eventual for-real career choice (I refuse to believe that the whole Castle-as-private-eye thing was more than a temporary aberration), to give Martha a late-stage career boost with a really good gig, or to lay some groundwork for the evolution to "Senator Beckett" down the line.

DCU
Clark Kent & Bruce Wayne

A note here: I am a modern Bat-fan chiefly by way of the Timmverse animated canon and a Superman fan chiefly via film/TV (notably Smallville, Lois & Clark, the Reeve movies, and the new Corenswet film), and am only just now wading back into the shallow end of DC's print universe(s) after a decades-long hiatus. Thus, my Batman is very much NOT the grimdark and not-always-quite-sane version we got from Frank Miller and his four-color successors (indeed, I grew up on Adam West reruns).

So my preference here, not least because the tag set specifically pegs them as Clark and Bruce, is for just that - a dialogue in which these two are both professionals with double lives, committed to being the best they can be at their jobs both in and out of Spandex, yet occasionally challenged by problems only another superhero can appreciate - most likely on both sides of the cape at once. (Alternately, a peek into both their private journals might be similarly entertaining in terms of things they don't say out loud to one another.)

Kim Possible
Kim & Dr. Betty Director; Kim & Yori; Ron & Yori; Ron/Yori; Shego & Ann Possible

Kim Possible was the show that propelled me into fanfic in a serious way, both as reader and writer, and I remain a fan of the series to this day. As to these particular prompts: I'm interested in how the working relationship developed between Kim & the other "Dr. D", and I've always thought Yori could have become a much more interesting character if she'd been further developed. As to Shego and MrsDrP...that's another duo I wish the show had developed further. (I wrote a couple of stories, very early on, which maneuvered them into being betas for each other's M-to-E-rated slashfic. I would not object at all to seeing that premise taken further than I got with it - but that's totally optional; I mention it purely to illustrate the potential for both comedy and a deeply weird but fascinating relationship dynamic.)

MCU
Clint Barton & Kate Bishop Kamala Khan & Cassie Lang; Kamala Khan & Kate Bishop
Maria Hill & Kamala Khan; Maria Hill & Kate Bishop; Pepper Potts & Kamala Khan

Pretty much all of these prompts involve various of the prospective "Young Avengers" lineup; what I'm chiefly hoping for here is the process by which all these folks get to know one another - whereas the first few MCU movies put the original team together in response to a specific crisis, Kate's and Kamala's generation is building itself in a space between crises so as to be ready for the next one, and that's going to make team-building look seriously and/or humorously) different. Also, this set of characters is - let's say "geographically diverse" (a good reason to conduct major parts of conversations via "mail" for narrative purposes). And although Pepper is the odd woman out in this cluster, she's also - in the wake of having lost Tony by this time - both someone whom Kamala might look as a means of connecting with the "old guard" and who is now in a real way a bridging figure between the old team and the new.

Continuity note: I am up to date with respect to the MCU feature films, but way behind on the various Disney+ series; in particular, I have so far skipped Secret Invasion but am aware of what happened it. For our purposes, let's rule that the Maria Hill in SI was a Life Model Decoy or similar, and that the real Maria is in fact still alive and active in the relatively current MCU.

Nancy Drew (Keene)
Carson & Eloise; Carson & Nancy; Eloise & Nancy

This set of requests arises out of pure curiosity. The thing is, while Aunt Eloise becomes a fairly regular guest character over the course of the yellow-spine books, I don't recall ever being given even the most minimal description of the elder Drews' family life or background beyond their status as siblings. (I am not sure at this late date if Carson and Eloise ever even turned up in person at the same place at the same time.) And though Nancy and her father are portrayed as having a close relationship, they seem to spend very little time together, at least onstage - he's almost never along, for instance, whenever Nancy is traveling.

So: let's fix this - maybe by way of correspondence between Nancy and her aunt about family history, maybe through diaries wherein unspoken feelings are expressed, maybe by father and aunt reminiscing via post (or sharing reactions to various of Nancy's adventures). I did a bit of speculating about some of this in one of my own fics; feel free to riff on that material - or not - as you find useful.

Stargate SG-1
Cassie Fraiser & Samantha Carter; Cassie Fraiser & Vala; Samantha Carter & Vala

I was charmed in the best sense by Cassie in the character's first appearance, and I'd very much like to see how one or both of Sam and Vala would have connected with her (mentor & student, mischievous co-conspirators, girl geniuses doing !Science!, ???). And we didn't get nearly enough onscreen development of Sam's and Vala's working relationship. (Cassie is featured in two prior stories of mine, for Unsent Letters and Crossworks respectively; feel free either to incorporate elements of that material or to go somewhere else entirely.)

Tomorrowland (2015)
Athena & Casey; Athena & Frank; Casey & Frank

I'm particularly fond of this movie - to my mind, it has the best qualities of the old-school Disney live-action features from the '70s and '80s, is remarkably inventive on its own nickel, and features first-rate performances from all three of its leads. It's those performances and those characters that I'd like to see explored in this request, along with your ideas about what happened next (a subject on which the film leaves a lot of room for speculation). Note that while all these prompts are two-sided, I'm not at all opposed to seeing material from all three characters in your story - and that this set of prompts is "&" rather than "/". (I have seen some excellent romantic fics in this fandom, but for present purposes I'd prefer to keep things more focused on other aspects of these characters' relationships.)