These are characters who people will dress up as for Halloween, kids will buy their toys and pretend to be them as kids, and non comic book readers will wear shirts with their symbols on them and see their movies. imo a top 10 list would be:
2. Spider-Man (honestly you could say he's tied with Batman but I gave Batman the slight edge because of the success of TDKR and also the Arkham games)
3. Iron Man
8. Captain America
9. Green Lantern (I know the movie didn't do so well but I still see a lot of people with GL shirts, I've heard non comic book readers ask if he'd be in The Avengers and he has his own cartoon)
10. Black Widow
Characters who just missed are Wonder Woman and Robin, I know a lot of people who are suddenly interested in Robin after TDKR. I also expect Superman to climb to at least 3rd on the list after Man of Steel.