DC games have had a pretty great run over the last half decade or so. The Arkham games are obviously seminal titles in the action genre, DC Universe Online has a dedicated audience and Injustice: Gods Among Us is a great little fighting game.
This cancelled Xbox 360 game probably wouldn't have joined those titles though. The video showed up on ptoponline's YouTube channel showing early development material of a proposed Justice League game by current Killer Instinct developer Double Helix. This footage is from the versus mode, but the game was set to be "more of a brawler".
Check out some the gameplay below:
I can't say I'm blown away by what was on show, but it was in early development, so I'll give it the benefit of the doubt. This is also just the versus mode, so I'd be interested to see what came of the brawler aspect of the game.