1. There will only ever be one Wii, Wii 2 Will be known as something new and fresh and ditch the Wii name altogether.
2. Q4 2012
3. WM+ like gyroscopic controls, perhaps they could build some kind of flywheel into it to give resistance to movement to give a more realistic experience. Anyway off the pipe dreams.. It'll have more acurate controls than M+ in both the Wii Remote and the Nunchuk. Also the speaker in the controller will either be dropped or it'll be improved upon as the Wii Remote's speaker seemed to be dropped in at the later part of development so now they can improve upon it. The pointer controls won't change but the sensor bar may have added functionality such as a small camera and microphone or something similar.
4. It'll come out later than it's competitors but it'll quickly catch them just as the SNES did and it'll also not have the problem of a huge lack of third part support so it should maintain Nintendo's lead
