Under 10 percent without question. Will the Wii U really sell 1 million consoles for every 9 million PS4s/ Xbox Ones sold? Plus, the Wii U's lifespan is bound to end a couple of years (at least) before the PS4 and XB1 do meaning a few years of literally no sales (if sales now weren't bad enough.)
I expect the XB1 and PS4 to do maybe 150 million between them before the end, and thats perhaps a conservative guess. Therefore the Wii U will have to reach 15 million in total. From here that seems an awfully big ask.
PREDICTIONS FOR END OF 2015: (Made Jan 1st 2015)
PS4 - 34M - XB1 - 21m - WII U -12M







