I still haven't seen this movie. From what I've heard everyone say, I don't think they changed it enough from the source material for my taste. I would recommend the following changes for the sequel to make it more original:
1) Costume is too colorful for someone to fight crime. Needs to be all black.
2) Having him live with his aunt is not cool. Who wants to do that? Place him in a secret hideout that's maybe dark and underground.
3) Talks to himself too much. Get him someone to talk to, like a teen sidekick.
4) I don't buy this nonsense with someone getting around by swinging on webs. Not practical. Why not have him drive around in some kind of "mobile" instead?
5) Get rid of the spider! People don't like spiders, so why should there be a character based on one. Use something cooler - like a bat, for instance.
This would be completely unlike any character that has ever been onscreen before and would shoot ticket sales through the roof! So high that it would project the box office returns onto the sky! Hey, that gives me another idea...