Mario X Rabbids may contain a hint as to what game Ubisoft is working on next.

[Cerebralbore101]

So I found an easter egg in Mario X Rabbids. The time machine has the dates Sep 23rd 1889, March 12th 1986, and Sep 24th 1998. The first date is the birthday of Nintendo. But what could the other two dates be? What games were released in Japan on those dates? These dates may hint to the next game Ubisoft, and Nintendo are working on.