Plot details revealed and Karai confirmed through LEGO set description?

[Slap-Happy]

The LEGO fan-site Brick Fanatics posted about the LEGO booth at the London Toy Fair, in which the new movie sets were described.

TMNT movie sets will be Turtle Van Takedown, Big Rig Snow Getaway, Turtle Lair New figs: Leatherhead, Spiderbytez, Kirby Bat, Karai (movie and show versions). Differently styled Turtles in the movie sets, much darker. Splinter has short legs.

This seemingly confirms that Karai is in the movie, unless it was just mis-reported. But we do also get a couple ideas of what goes on in the movie as well, with sets called "Turtle Van Takedown", "Big Rig Snow Getaway"