Scribblenauts Unlimited

Scribblenauts Unlimited is an upcoming game by 5th Cell. It was announced at the 2012 E3 on June 5th.So far from a game trailer, here is what fifth cell has announced will become available:

Multiplayer
New modes like playing with a friend instead of just sharing a custom level with them. This means BOTH players are playing together in the same world at the SAME time. The two players can also share customs with each other, and edit them.

Story Line
The all new Scribblenauts Unlimited is said to, by fifth cell, show the story of how Maxwell and his notebook came to be. From the E3 trailer, it appears if it has a new unknown female character, who notably bears a resemblance to Maxwell's sister.

Custom Objects
Fifth Cell has also announced the additions of making custom objects that appear to custom words. It looks as if they can only be made by pre-made object pieces, to stay within the animation style of the Scribblenauts series.