Not enough resources probably to work on all versions. You can bet the wii u version is mostly a straight port of 360/ps3. Maybe they didn't have enough time to port their ps4 code to xb1. It's no secret that was their lead platform for nextgen. Movie Licensed games are almost always rushed.
There's a PC version, though.
Also, that'd account for a delay, perhaps, but 'delayed indefinitely'?