I don't think so. If I'm remembering this correctly, the big reason they went with the outer space theme in Galaxy is so they could create tiny but detailed worlds, locations and simple but effective effects. Basically, they made a game with small but impressive environments to accomodate the Wii's low power. Pretty smart, because the end result doesn't look below anything on the PS360 and proved the Wii could actually do something right. WiiU won't have this limitation.

If someone shoots this down, I'm not sure, I might've just made this up in my head .

I think they will probably go with a new theme. They've used Galaxy for two games now, which is rare. It could be called Super Mario Universe, but I think it will have a different feel than the Galaxy games. Much bigger worlds and impressive visuals.

sure another theme. Galaxy is all about gravity and was perfect with the nunchuck. They have to do something with the gamepad

I'm one of the few people in this world that REALLY wants a Super Mario Sunshine 2.

Sunshine emphasized exploring and finding secrets everywhere. It also introduced fun, innovative, new game mechanics that made perfect use of the ultra-pressure sensitive gamecube controller.

Less by a healthy margin

I think 5-7m lifetime, maybe less

unless they would bundle it... i would say less

5m. In the Sunshine region but with less install base penetration in the US.

Wii U doesn't have analog triggers/shoulder buttons, unfortunately.

Very interesting prediction, is there some reason you think this?