just because there's alot of characters and things going on doesn't mean the film will be cluttered at all... it's all about establishing a universe. We know MJ isn't in the film very long.. her inclusion is just minor and a stepping stone for later.
Rhino is not a major villain nor should he ever be treated as such. He's a grunt. And seems to be the reason Spidey acknowledges Max as a human being...
so that's 2 characters that really have no large portion. I think it's also safe to assume Norman will have while important roles, not alot of screen time in this film.
I think it's also safe to say this film (if gwen dies, which it's looking like she will) will end on a sad note. I think Peter will have defeated Electro... and the day is saved.. only to have Gwen snatched and killed as he meets his arch enemy for the first time.
i see it all as very workable. I also think we may be lead to believe Harry might be the goblin
Electro is still the main focus of the film, but that doesn't mean other characters cant shift in an out. Webb said a while ago, they're establishing spidey's universe