Oh, fuck, I just thought of something. As I mentioned earlier, I've been playing the LittleBigPlanet beta on Vita. As far as I can tell, with the exception of some MP kinks and a few connectivity glitches, that game is done. I mean, they could probably ship it within a couple of weeks if they wanted, it's so done. Nothing shown about it onstage, nary a mention of it, particularly a release date. Yet they made a distinct bullet point of using your Vita to control LBP 2, and how there's going to be DLC specifically tailored to the Vita with "an all-new story, costumes, props, stickers" etc.
I think I know what that DLC is going to be. It's gonna be what used to be LBP Vita. After that nonshowing, I could totally see it being quietly cancelled, with all assets shifted over to PS3 as that LBP 2 DLC pack Tretton was talking about.