According to ComingSoon.net:
"In an article at The Los Angeles Times, the author writes that there's a possibility that Adam Sandler will appear in Sony's The Green Hornet opposite Seth Rogen:
'I also heard a random rumor about the 'Hornet' film: Two different people in the industry told me that Adam Sandler has a brief but key role in the movie as a certain surprise superhero...I heard which one, too, but I don't want to ruin it. Sandler and Rogen have another project together as well.'
The studio has yet to announce a new director after Stephen Chow dropped out (he's still expected to play Kato), but it is still targeting a June 25, 2010 release."
Hmm. Well, in the 60's, Green Hornet and Kato appeared on Batman (yes, the Adam West one) to promote their show (which bombed for not being as campy as Batman in the years before The Incredible Hulk). So maybe, Adam Sandler could be the Caped Crusader? Who knows?