Yeah, if I do get a Wii U, it'll be in a year and a half at the very least. I assume the game will just be releasing round then anyway. I'd be shocked if it came out mid 2013. However, like I noted before, I can't see myself getting a Wii U before a PS3. I still need to experience Yakuza, and I think the PS3 offers much more than a Wii U does. And if XBOX 720 or PS4 are announced before Bayo 2, I'll probably end up wanting one of those consoles.
But I feel your pain. One of my beefs with the Wii U is that it's basically a third HD console arriving to the party too late. The launch window library has shown that in terms of third party content, it'll have most of the same stuff the 360 and PS3 has. Sure it'll have exclusives, like this game and the usual stuff from Nintendo, but I just can't justify owning a 360, a Wii U AND a PS3 AND be looking forward to a next gen console. I know some people have the money, but I really don't. Sure I work and make a steady paycheck, but asking me to plunk down $350+ on a gaming purchase is not an easy decision, and when I do make that decision it comes very rarely. Last full priced console I bought was the 360 in 2009. Bought the Wii for $80 used in early 2011, and I bought a 3DS XL for $200 this year (had some trade in cash applied to that total).
Again, SEGA needs their own console so we don't have to juggle hardware!