The one thing I wonder about is this.
Would Berman have been amenable? Because Berman doesn't strike me as the kind of person to do something for fun.
I'm curious of Moffat might be interested, because I could see J.J. Abrams being open to some sort of crossover episode in 2012. Hell, for Paramount it would be a way to promote the new film, remind audiences that Star Trek
is about to return in a big way.