That actually sounds like a really fun movie. I'd watch it.

I would, too!

I think we've got Rocky starring in Star Trek III. I'm not even sure where you'd go with that. Illicit Starfleet underground boxing ring?

I am confident those exist, to the point where I feel there should have been an episode about one (or some futuristic equivalent, but if people play baseball in the Starfleet future, they probably still box).