His Supernatural co-star Jensen Ackles may have gotten the bulk of the attention when word came of a new Batman being cast (or when discussing any DC hero), but Jared Padalecki's own attributes shouldn't be overlooked. For starters, the actor is about as close to Grayson as physically possible - and no, we don't just mean his famous physique.
With a career built on playing one part of a two-part detective team, and walking the line between hero and terrifying monster fairly frequently, Supernatural fans don't need to be told why he's already proven to possess what's needed for a live-action Grayson. The fact that he's one of Warner Bros.' most reliable fan-favorites shouldn't be understated either.
Normally, we'd think that the TV schedule would make a big screen appearance unlikely. But given that the role may be a small one to start, and Padalecki's enthusiasm for the Comic-Con crowd, we wouldn't count him out.