Originally Posted by Closet Geek
...IMO they'd be better off using the original cast as random cameos, like Stan Lee in the Marvel films.
Oh God, that wouldn't work at all. They can get away with using Stan Lee because he's not associated with any character in the Marvel universe. But more people recognize, for example, Walter Koenig as Chekov than as Walter Koenig - you can't just drop him into a Star Trek film and expect people to believe he's anyone except Chekov.