The Scott Pilgrim vs The World DLC was supposed to be available on Xbox Live today, adding in the much needed online co-op functionality that gamers so desperately craved while also adding in a new playable character. According to Ubisoft though, the content has a new "release window" which is sometime this Fall.
As we've already been waiting two years for the content, waiting another two months probably isn't that huge of a deal, but Ubisoft is missing a time when gamers are starved for new content before the Fall rush. Hopefully this won't get lost in that when it happens.
Source: Joystiq.com