This is a great list, but ultimately too short... by that I mean endlessly expandable. I'd personally love to see a movie made of The Sentry.
For those who don't know, he was created by Marvel sometime in the last decade when they realized they didn't have an All-American All-Powerful hero to rival Superman (sorry, Cap, you can't fly). So in his origin they showed that he actually has been around all these years, but there's been a mass brainwashing imposed on all of the other super heroes to forget he ever existed. As he begins to regain his memories, he has flashbacks that are drawn/written in the comic styles of decades past. This would make a great movie because they could do the same thing spoofing how superheroes have been portrayed in movies over the years (eg. black & white, adam west era-ish camp, late 80's neon, etc...).