Yeah, it's fair, Specially since it would sell pretty bad on Wii U. Better release it as one of the early flasgship titles of the next console, like Prime 3 with Wii.

Why does it have to be a 3D Metroid on console and 2D on portable?  Just because it's a console doesn't mean you can't have a 2.5D or even 2D game.  I like to play games on the big screen so if a Metroid did come out, I'd rather have it on console, not portable, and a 2D game, not a sequel to those crappy Metroid Prime games. 

Retro isn't doing Diddy Kong. That has barely gotten beyond even a bad rumor phase. Who knows what they're doing.

But there is nothing saying Wii U won't get a Metroid. JUST so long as they never make anything like Other M, ever again.

Especially since Metroid sold best on the Gamecube.

Yes!!!

Because it's better.

Well, it's not that simple. The game you're referring to must be the first Prime, which is the best selling Prime to date, but that's it. First game sold better than sequels, but Prime 3 on Wii outsold MP2 Echoes too. It reverted a downfall, plus GameCube sold better than Wii U in its first years. I mean, it's hard to expect a new Prime to sell better on the smaller install base of a Nintendo home console ever, plus on a time period where any game on this console that is not Mario/Zelda-related is suffering to do well.

With games like Pikmin, Bayonetta and even Donkey Kong struggling to reach the 1m mark, can we really expect a new Metroid to do great on Wii U? Wouldn't it make more sense to hold it until the start of next gen and release it very early to faster attract Nintendo hardcore fans + maybe new fans? Cause I believe most people that would buy a Metroid already have a Wii U.

It's only fair if no games release on the WiiU, right?

Nah. Metroid is Wii U's marquee title in 2016. You can hold me to that.

It all depends on how much hype they can build up.