Some lucky gamers have been able to get their hands on retail copies of Street Fighter X Tekken early, and it appears that a couple have peeked around that data on the disc. What they've found is that the yet to be confirmed DLC is on the disc. The rumors were that the game would have day 1 DLC featuring several characters that have been confirmed for the PS Vita version of the game. What's been found is that these characters and prologue/ending videos are on the disc.
The characters in the videos include Dudley, Elena, Mega Man, Pac-Man, Sakura, Blanka, Cody, Guy, Lei Wulong, Christie, Jack, Bryan Fury, Lars and Alisa. Two gameplay videos featuring Elena and Blanka have also shown up. As expected, news of this has outraged many gamers. There has been no response from Capcom regarding this discovery.
Source: Destructoid, Eventhubs