At 8:57 in this interview.
Also giant characters like Great Ape Vegeta will not be playable and story mode only boss. This also most likely means Golden Great Ape Baby will be in the game as a boss.
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http://img401.imageshack.us/img401/33/shadowkenj.gif
LOL!!!! I hope that's a joke....names don't get more n00bish than that