Sackboy might be done with platforming in the near future, but the confirmation of LittleBigPlanet Karting has shown that his series of charming games is far from being in hibernation. While the idea of a Sackboy being center-stage for a racing game of his own has been exciting, it's the prospect of it coming to the Vita that has really set it off. Unfortunately, that one-day old rumor has already been shot down.
Gematsu confirmed through a Sony representative that LittleBigPlanet Karting will be a PlayStation 3 exclusive, and "GameFly is incorrect" in regards to it coming to the handheld world.
Hopefully they'll reconsider because Kart Racing fits well on a portable with quick entertainment value. Worst case scenario you'll likely be able to play it via remote play once the feature is made available on the Vita.