We all know the Wii U will be backwards compatible with most of the Wii Games/Accessories. But I have a few doubts, don't know if you guys know anything about them. First, can I play with my original wiimotes without the motion plus add-on or do they only work with the motion plus accessory? I´m asking this because I also have a Wii guitar in which you have to connect a wiimote on it to make it work. I'm assuming that to play, for example, New Super Mario Bros U I would need a motion plus addon, but could I play an old Wii Guitar Hero game on a Wii U with my guitar even I don't have the motion plus? 

Also don't know if ALL the wii games will work on the Wii U. Any kind of info is welcome