So we will see humans fighting the T-800's without the synthetic skin,because the T-800's are gonna be brand new technology in this movie,and the synthetic skin is an update for the T-800's which haven't been invented yet,so no Schwarzenegger.

No........ you got to remember in terminator 1 they had a scene with a terminator that wasn't Schwarzenegger...so they don't need him Now Schwarzenegger will be needed later especially if John is going to die the way he was said to die in T3(by a T-1000 dressed up as Arnold)

honetly, I love Treminator as much as all you fellow geeks and gore hounds BUT but by the time they come out with part 5, Schwarzenegger is going to be in fucking depends. What's he go gonna do, appear as the old dude who builds wheelchairs for the injured human soldiers. The guy who once was the best soldier and was the inspiration for the original T-800 design??? Fuck that's not a bad idea. lol

Arnold is still looking good and still has his blond hair from the conan days but I can see how he might not be a Terminator that or we'll need alot of makeup

Remember!! John Connor now knows he was assassinated by Arnold's T-800 model. The future is not set.

I agree, I think he's too old to be in another Terminator movie. If he appears I think they should do it with some stunning CGI trickery and keep it to a minimum.