Celebration. Nintendo is going to celebrate the 35 anniversary of Mario with many games, the most of all would be remastered titles appeared on previous systems.
According to VGC, Eurogamer and Gematsu, Nintendo is planning to release a new Paper Mario this year along with a Deluxe version of Super Mario 3D World powered with new levels. Gematsu defined that the big N is even working on remastered versions of Super Mario 64, Sunshine and Galaxy to be released on Switch.