Honestly, I hope they do change the name and also hope that "Wii" isn't in the name at all.
I don't like:
Wii U
Wii 2
Super Wii
The best out of those is Wii U though IMO.
I suck at thinking of names so therefor I won't. Out of all of the options posted in this thread:
Stream is the one I like the most because it makes since and still sounds good