As for the original post - how have Wii U owners treated Ubisoft shabbily? That's nonsensical.
I'm not sure what bad rep Ubi Soft has, aside from I guess some of the glitches of the Assassin's Creed games after and including 3, but Ubi Soft has been more than fair to Nintendo. They were more than holding up their end of the bargain by literally were putting out more disc games for Wii U in the first year than Nintendo was and the system sales and support that Nintendo promised just weren't there, still aren't and won't be until Smash Bros comes out (which I'm more and more convinced won't be this year).
It's definitely a loss for Wii U players, given how strong some of Ubi's recent games have been, like Rayman Legends and ZombiU, but unlike EA, who talked a big game on supporting Nintendo and gave up immediately after launch, Ubi gave them the benefit of the doubt, but now, enough's enough and Ubi is totally right to be easing back on their support for the system.
I tried looking up the release date and couldn't find one either.
Looks like I'm not the only one.
It makes sense for it to be delayed if they're splitting teams/resources to work on the 3DS version. Until that comes out, they can't set a release date as all of their people are tied up on that project. With little in the way of good games coming out in the later half of this year on the Wii U, it looks like the PS4 and Xbox One will continue to trounce the Wii U.