I never heard back from them, but, not too long thereafter, Marvel ran a similar story. I raised an eyebrow, but had to concede that both stories were building on the same preexisting bits of Marvel lore...
My very first piece of ST fanfic was published in an Australian fanzine that had a circulation of about 300 copies. Not long after the zine materialised, along came the licensed ST novel, "Black Fire". There had had been quite a hiatus in original novels at the time, so "Black Fire" was eagerly awaited!
Reading that book was so eerie. The "B" story of that novel matched elements of my story on
at least thirteen points, right down to the destruction of the bridge module of the Enterprise in the "teaser", and Mr Spock's replacement by a new first officer:
Therin (in mine) and
Thorin (in Sonni Cooper's novel).
I'm sure Ms Cooper's manuscript would have been submitted and edited long before my story was conceived and published - but, as my story had won a local amateur writing contest before it was published, it was certainly in limited fannish distribution, and thus beyond my control as to who read it early. (There's no way Sonni Cooper needed my help to pad out her novel. My paranoia grew a little when I heard that Sonni Cooper had fannish connections; she used to run Bill Shatner's fan club, IIRC.) I was young, and very new to fandom, but the coincidences were quite extraordinary. It's not as if I contemplated accusing Ms Cooper, Paramount or Pocket of anything, though.
Some time later, I was on a Peter David listserv, which had the same "no sharing story ideas" rule as here. At the time, PAD's "New Frontier" novels were teasing us about Mark McHenry's mysterious superbeing powers. The books seemed to be suggesting that Mark was... a Q? Someone posted a very elaborate argument to the listserv as to why McHenry was not a Q, but an
El-Aurian, and PAD replied,
"Thanks a lot. Now I have to toss out that idea and come up with something else."
We never knew if he was joking or not. In the end, though, Mark was neither.