Not too surprising anymore
Whenever Tekken Tag Tournament 2 arrives for Wii U, the game will already have DLC characters and stages from the Xbox 360 and PS3 versions unlocked. So confirms producer Katsuhiro Harada during a private Namco Bandai event this week.
Tekken Tag Tournament 2 Wii U Edition already bundles in some extra content, but Harada felt that all versions should have access to the same characters. During the event, he also downplayed the recently discovered content found on the Xbox 360 disc, noting that "not all the content [Namco Bandai] bplanned for the PS3 and 360 has been revealed yet, so there's still some stuff left."
Namco Bandai certainly aren't the only company trying to lure gamers to Wii U versions of previously released games this way. BioWare and EA are doing the same with Mass Effect 3 on Wii U, which will include an extrasquad member and associated content that is otherwise available only through Collector's Edition or as paid DLC.