I think its quite unlikely. Final Fantasy XV might as well be THE game of the generation in Japan. We're talking about a Main Entry being released at least six years after XIII, a game that has (and will) get overwhelming amounts of coverage and hype from the media and gaming community in general. And I don't care what the haters say, Japan still loves Final Fantasy.

I do believe Splatoon will break the 1 million mark by year's end though. Smash U better be ready to be the third best selling Wii U game in Japan.

I would say there's a chance that Splatoon will outsell, but I think that chance is small.

I don't think so

Smash U is currently the fourth best selling Wii U game in Japan.

Nah, that's never happening.

It has a chance, but I'll say no..

Splatoon it's been selling pretty good for many weeks so wouldn't be surprising if can top 1 million. Now unless FF is uterly shit I don't see it doing less than 1.5m, even 13 sold almost 2M and that's on a console without kingdom hearts and dragon quest.

On the other hand if it releases on this new nintendo console, who knows? maybe hurts its sales on ps4 and splatoon wins? it would be fun xD

Splatoon will sell over 1.5 million easy in Japan. Final Fantasy will be lucky to sell 1.5 million...
So, the TRULY question is, will FFXV sell more than Splatoon?
No, that's seriusly hard, i can see 10% chance for happen.

Splatoon is too strong.

And of course, i talk about Japan, Globally, the gap will be abissal...

 I agree about FFXV at 1.5 million, but Splatoon? I mean... of course will. Splatoon will sell nearly 1 million only this year. then, will easy sell other 500k in 2016 / 2017.

Will happen, and when will, much crow will be served.