I have recently purchased the Cross-Controller pack in LittleBigPlanet, which makes use of the Vita in LittleBigPlanet 2. Fortunately, you don’t need LBP Vita to play with the pack.
The story is about space-traveling pirates, who are in jail. Sack-thing’s ship crashes into their cell, and they break out and search for treasure. I’d recommend purchasing this pack, although it is very short.