Here's something that Sam Raimi said...
Just read this from the article:
"Finally, Raimi said that for him, his favorite version of Spider-Man is that of a teenager being forced to deal with life as a superhero. "He's most powerful to me as an adolescent. The thing that Stan Lee created that was so special was that he was a very young character, and he's a kid trying to deal with these fantastic powers."
Since Spiderman is a teenager in the Ultimate universe, Raimi might do a movie based on that.