The fact that the costume is my only concern should show I have loads of faith in Sam Raimi. I'm probably one of the few who really liked Spidey 2, though. My only gripe with that one was Parker was a tad emo in that one. I mean, there's hardly a scene where someone isn't crying somewhere. But, other than that, I really really enjoyed Spidey 2.
Spidey 3 is going to be awesome. I'm sure they'll figure a way to make the symbiote work without shitting all over everything. I'm trying to remember how the symbiote shows up in Ultimate Spidey... um... Oh yeah, Parker and Brock's dads were scientists and they made it and kept it locked away 'cuz it kinda' didn't work the way they wanted it to or something. I know it sounds gay, but if you read it, it's not really that bad. (I'm not saying they'll use that, but it's an option).
It looks like Parker's going for a total Jack White kinda' dark Damien evil look in this one, heh. I'd guess the symbiote turns Pete into a badass dickface agressive jerk and makes him all hardcore before he realizes it's turning him into a monster. Did you catch the darker emo hair and clothes while he's dancing with Gwen Stacey?
And I've seen plenty of ways they can make the multiple villains work. Someone mentioned something about Sandman being the main villain in the movie, Goblin II not showing up 'till way later in the movie once Harry turns to the dark side, Brock having a really bad day in the background with Venom showing up toward the end of the movie which will make a really good "Previously on SPIDER-MAN..." for the next movie.
"We maaade loooove like a pair of Black Wiiizards!"