So, let me work this one out a loud...
The Wii U Game is done.
The Wii U has no install base.
Ubisoft didn't want the game to bomb, so they decide to port it to PS3/360.
Ubisoft wants to consolidate marketing resources so it delays Wii U Version to the fall to market all three platforms at once.
Ubisoft rips a mode out and releases it as a stand alone game for Wii U owners to placate them.
... Sound right?
Dinosaurs eat man, woman inherits the earth.