Oh, Wii U will EASILY outsell the Xbone, provided Nintendo doesn't cut off the lifespan of Wii U short. Xbone doesn't sell anywhere but the US. Wii U sells in all three major market (though it does poorly in Europe, it's not completely non existance like MS consoles in Japan, and furthermore MS also does pretty poorly in Europe). Nintendo also has a ton of jugarnaut franchises to help push sales. MS has very little up cards up their sleeves in terms of actual games, especially exclusive ones. It's pretty much Gears and Halo at this point.
Before you call me a hater or whatever, I own an Xbox 360 and play it the most of any of my consoles, and I plan on buying an Xbone. If anything, I'm a Sony hater, not an Xbox hater :P
Follow me on Twitter, fellow gamers! [I typically rant and ramble about mostly Nintendo, indie, retro, and Overwatch related gaming, Metal and hard rock music, Classical Liberal and Cultural Libertarian politics, and bitch about Chicago sports].