Looks like LittleBigPlanet 2 will be getting a debut in the June issue of Game Informer.
The news that the game was indeed real was revealed through GI announcing its Gears of War 3 coverage.
The June issue also includes huge feature articles on Little Big Planet 2, Marvel vs. Capcom 3: Fate of Two Worlds, and Fallout: New Vegas. Plus, watch for our complete reviews of Red Dead Redemption, Lost Planet 2, Skate 3, Alan Wake, ModNation Racers, and Super Mario Galaxy 2.
So, now that the cat is out of the bag, all the tweets, a Sony Benelux rep saying that LBP2 was on the way with Move support, and sources claiming the game was in development were all right on the money.
Despite Media Molecule denying it.
Maybe this means we'll see more at E3 then.
There's also some supposed information on it through here, but don't get too excited just in case (thanks, Lucky).