The only thing I can think of for the PS4/XBO port of a Wii U game that actually makes sense is Lego City. It's the only one I think of that would actually pay off financially. The Lego brand, and it's games, are big on all 3 consoles. And open world games are all the rage. So, a Lego open world game would sell quite nicely on the PS4/XBO.
As for the port to Wii U, not really sure. Destiny may be right, given that is is their "biggest thing" they have ever worked on. It does seem like it would take a bit more resources and time to get a online shooter the scale of Destiny to work on the Wii U, at least compared to something like Mass Effect 3 and Deus Ex. Or maybe they are handling a port of Batman: AK. Maybe rated Teen for Wii U.
