If only... Because who doesn't want to see Batman and Captain Kirk together again for the first time! More about its creation here.
Hmmm, to bad this never happened. They did do an X-Men one after all, so it would have only been fair to do DC too.
DC pitched Paramount on a Star Trek/Superman crossover. Paramount's reason for declining the pitch? "But Superman isn't real!" I'd love a Legion of Super-Heroes crossover. Or Hawkman.
Ok, that Superman thing is funny. I don't see why he couldn't just be from an alternate universe. Isn't that what they did for one of the X-Men crossovers. Even with my limited knowledge of the DCverse I know that would kick ass!
And of course the Marvel Trek/X-Men crossovers were assumed to be "imaginary stories" with respect to both universes. After all, ST has often been referenced as a work of fiction within the Marvel universe. (There was even a Spider-Man issue revolving around Peter Parker and his friends attending the premiere of Star Trek: The Motion Picture. It was scripted by Marv Wolfman, who was simultaneously editing Marvel's TMP-era ST comic.)
Who might the Green Lantern of Sector 2814 in the 23rd-century be? (Duck Dodgers suggests that Hal Jordan is still active until the 24th-and-a-half century; he aged very well.) Oh... fuck. It just occurred to me who a realistic option for the 23rd-century is, without being excessively fanwankish. (In other words, it's not one of the main Star Trek characters.) And now I'd want to write that... *sigh*
You know I heard that Chris Pine was once considered for the role of Hal Jordan in the Green Lantern film their making if. So if he had gotten it and the made a crossover we probably would heard about Kirk looking a lot like Jordan.
^ Doubtful. At least, it wouldn't have come from me. That is....unless I just knew it'd piss people off