WiiU is hardly expensive my friend. That's a moot excuse.
I'd say grab it now. Even if no games come out for it that appeal to you, there's the eShop that will help. Or you can just grab a Mario title or a title that's on the other consoles. Because when the games do start coming out, chances are, if stores are only getting like 5 each shipment, it's going to be pretty tough to find a console down the line. Not to mention, if there's any Wii titles that you missed out on, and don't have a Wii, well, now you can play them in the WiiU.