The other is 1987's Robocop, which launched director Paul Verhoeven's Hollywood career. I can see the appeal of a new Red Dawn: I recently watched the movie again on DVD and was surprised how slow and melodramatic it was. It hasn't aged well at all.
Robocop, on the other hand, is pretty perfect the way it is. What could they possibly do in a new version that Verhoeven and Iron Man haven't already done - except ruin it with a bunch of CGI?
Man, I sound old.