This just went from day 1 purchase to waiting for a sale.
Scott Pilgrim finally gets multiplayer via DLC
Scott Pilgrim vs the World: The Game is a great "retro" 2D action game with 1 major flaw--it lacks online multiplayer support.
Soon after the game's release, Ubisoft said they were working on downloadable content that would add Live online MP to the game as well as an extra character. Scott Pilgrim creator Bryan Lee O'Malley has posted about this DLC on his blog before, but this time the release date is confirmed by Major Nelson: http://majornelson.com/2013/01/29/content-coming-soon-to-the-xbox-live-marketplace-23/
The DLC pack will be released February 6th and will cost 400msp* (it was originally to be 160).
The pack also includes Wallace Wells, Scott's roommate, as a new playable character. 2 years is a bit tardy to the party but better late than never, right? If you enjoyed beat 'em up games like Double Dragon, Streets of Rage or Final Fight then you should try Scott Pilgrim vs the World.
Big thanks to K0mbat Dan for the tip!
+UPDATE!+
Here it is, in big, brazen 14pt letters, the DLC "pack" that will add multiplayer to Scott Pilgrim vs the World: The Game!
http://marketplace.xbox.com/en-US/Product/Scott-Pilgrim-DLC-Online-Multiplayer-Wallace-pack/3d5f09df-9b31-4721-a34d-67011eebdd26