The main reasons I can't wait to see FF2 are to see more of Chiklis as The Thing (he totally OWNS that role) and to see Doug Jones as the Silver Surfer (DJ was great as Abe Sapien in Hellboy, so think of how cool he'll be as SS).
Also, I have seen the 1994 FF movie and it's actually not that bad. It has a better Doctor Doom than the newer film and The Thing is impressive for how small the budget was. Anyone who's interested can find the whole film to watch (broken up into 9 parts) on youtube. Just search for Fantastic Four and you'll find it pretty easily.
The Official Lugofilm Ltd Youtube Channel: http://www.youtube.com/user/bartsimpson83
Well, the talk about "the suit" wasn't exactly spot on (he's still not big enough), but otherwise hopefully this will be one of those sequels where everything is "upped", from the story to the effects, everything.
Like how the first Austin Powers wasn't actually a super-smash hit, but made enough so that they could make the sequels "bigger" and they then were actually smashes.
The FF deserve more than the cookie-cutter, but fun, kind of outing they got first time around, and this looks like it may well deliver big time (in that same fun way, but "better", y'know?).