It's official, the Wii U version of Aliens: Colonial Marines has been cancelled:
"Sega can confirm that the Wii U sku of Aliens: Colonial Marines is no longer in development."
The game was originally expected to launch in March and was reportedly the best version of the title (although given the reception it ultimately received, that's probably not saying much).
There is a bit of good news, however: it's also being reported that the cancellation has not resulted in lay-offs at the developer, Demiurge Studios. The company released a statement saying it's "business-as-usual" following the cancellation of Aliens: Colonial Marines for Wii U.