Ubisoft has revealed that they have a brand new unannounced title in development for the Nintendo Switch. It is not entirely clear if it is the Mario and Rabbids crossover title which has been in development for quite some time by the development team but has never formally been announced. Whatever it is, I’m sure we shall see it at E3 next month.
Ubisoft: "We have new games on Switch. One new game not announced. One or two others as well".
— Daniel Ahmad (@ZhugeEX) May 16, 2017
Thanks to awesomeaussie27 for the tip!