Mario + Rabbids out in Japan only in 2018
While one will expect a game with Mario in it to be launched first in Japan, the West will instead be playing Mario + Rabbids Kingdom Battle first.
This is due to the fact that Ubisoft and not Nintendo will be handling the production of the game.
In Nintendo Japan’s news page, it states that Mario + Rabbids Kingdom Battle will only arrive in 2018, though no specific date has been given
Mario + Rabbids Kingdom Battle will arrive on the Nintendo Switch on 29 August 2017 in the West.