You might have caught these already, but if not here you go.  The showdown of superheros will take place in the summer of 2012.

The Dark Knight Rises

[youtube=http://www.youtube.com/watch?v=q-Sktgm0aD8]

The Amazing Spider-man

[youtube=http://www.youtube.com/watch?v=upwf8RsyNqQ]