Well, it's a tie, Yokai sales are slowly fadding while third Pokémon titles have never shined in their third release, tough the dual release ala B2/W2 is still possible and the lack of Pokémon games for one year might cause  players to jump on Z...

http://www.vgchartz.com/gamedb/?name=Yokai+Watch&publisher=&platform=&genre=&minSales=0&results=200

http://www.vgchartz.com/gamedb/?name=Pok%E9mon+Black+2&publisher=&platform=&genre=&minSales=0&results=200

#1? Not a chance! Might not even make top 5...

Pokemon (Z/Whatever)
YW3
FFXV
MH (something? XG? Stories)
More YW (you never know)
Unnannounced WiiU or especially 3DS game :p
Persona 5?

I don't see Yokai watch sales fading at all right now. Yokai watch 1 was outsold by 2 and version 3 of 2 sold over 2 mil. Busters is a spin off so I wouldn't count it. As long as it doesn't suffer a huge drop off Yokai watch 3 will probably beat Pokemon... but I'm not crazy enough to bet on it.

Won't even outsell dqxi on 3ds.

Too expensive for a minecraft clone, even if it´s a DQ minecraft clone.
As others said it will probably be Yokai Watch or Pokemon.
On Playstation the best selling game should be FF XV, could be something else depending on if FF sees a big decline.

Maybe I misread, but this game is not coming to Nintendo platforms?

but no, Pokemon (which there probably is one) or Yokai Watch should be able to sell better than this game

Lol Nope!!!

You got Monster Hunter Stories, Yokai Watch Sangokushi, Yokai Watch 3, and maybe Pokemon Z!

It will be 3DS's Year again!

Yeah yokai and level 5 are stealing that marketshare in Japan.  This could happen alright :)

I don't think it will even be close, honestly. Even with all platforms combined.

Yokai Watch 3, Final Fantasy XV, Monster Hunter Stories and a potential Pokemon will all sell more.

Could be, but probably Pokemon Z or whatever.