Most of the more poorly sold Nintendo consoles had their peek in the 2nd year. Like N64 in 1998 and GCN in 2003. But Wii had it's peak in 2009 (although i think vgchartz says 2008) Reggie even said in an interview a couple of years back that instead of Wii peaking in it's 2nd year, it peaked in it's 3rd year and it sold  more in it's 4th year than year. (Just explaining that) It's 2014. I would say, this is it's peak year. But next year seems to have more games. It's already half way into 2014 and Wii U has only had 2 big games. And the second half has 4 or 5 big games. But 2015 already has many games that seem to be big. Like The Legend of Zelda, Star Fox, Mario Maker, and more. I honsestly think now (thanks to E3) that Wii U will sell more in 2015 than 2014. Here are my 2014 and 2015 predictions. (and now I believe that Wii U will no doubt outsell GameCube, I made a thread a while back questioning if Wii U will outsell GC, and now that I believe Wii U will have a bigger 3rd year than 2nd year, it will probably pass it sooner than we think)

2014- 4.8 milliom

2015- 5.9 million

I know it seems extreme like most of my predictions are. But I believe Mario Kart 8 will carry Wii U for awhile. Then Hyrule Warriors will begin to help carry it, then Bayonetta 2 will give it a decent boost, then Smash Bros. and Captain Toad: Treasure Tracker will propell it foward and give momentum to 2015. Then there's many games in 2015 that will help it even more. I'm nt saying these games will make Wii U break records and win the generation, but it will sure help it A lot and that's exactly what Wii U needs. Which year will Wii U sell more and what how much do you think it will sell in 2014 and 2015?

i see it selling more in 2015 due to the fact that 2015 for the Wii U looks it could have as good of a line up as the 3DS did in 2013 and 2013 so far as it seems will be the best year for the 3DS

2014. It's all downhill after this. What Nintendo can only hope to do is control how quickly it goes downhill.

Depending on when Smash Bros launches... Like if the Final Date is say Early December, than I say 2014 cause MK8 and SSB during Holiday should sell more than Zelda U and... Thats the only system seller for 2015 so far?

really? i think we have already hit rock bottom and its just up hill from here

Rock bottom was the Year of Luigi. This year is your recovery, for the Wii U at least. There's no way the Wii U will have a strong enough presence to continue lifting in sales, the consumer doesn't want it.

Want to bet? Since your so sure and all

I was expecting a better 2014 for the Wii U. It appears Nintendo is banking a lot on 2015 considering the confirmed line up is amazing, so it 2015 might be a better sales year. Knowing Nintendo they'd probably fuck up the release schedule

2014 of course. 2015 may have a better lineup but nothing is coming close to Mario Kart and Smash Bros.

No. I don't approve of your addiction to bets. It's sickening.