The first details (and acknowledgement that it exists, really) on LittleBigPlanet 2 have arrived, via Game Informer mag in the states.
Basically, where the first LBP had you building Mario-esque platform levels, the sequel will allow players to make entire games; shooters, racers, puzzle games, Space Invaders clones - even RPGs. One Media Molecule developer had even built a fully working Command & Conquer clone.
The most important addition to LBP2's all-new level creator - which you can even use to customise the game's HUD - are the "direct control seats". These can be attached to objects to customise the controls of the game, creating the feel of an entirely new game.
For example, Media Molecule says you can attach a control seat to a makeshift car, set SixAxis tilt for forward and reverse, and assign the horn to the X button. You can even put a direct control seat on Sackboy himself to completely customise the feel and controls of your protagonist - it's possible to recreate the exact jump from Yoshi's Island on Super Nintendo, says the developer.
LBP2 also makes advancements in how you put enemies into your levels, with the addition of Sackbots. Sackbots have various enemy style templates that can be tweaked and dressed however you want.
And that's not all; there are movie editing options for cut-scenes, you can record your own sound effects, string levels together to create an entire game and transfer all of your download content from the original game.
This is serious stuff. We'll bring you more details as they arrive.