Regarding the four ports: Based on rumors, it's very clear to me two of them are Zelda and Smash. The other two, if I had to guess, could be Donkey Kong and Xenoblade. I don't think they would bother with Pikmin 3 if they have Pikmin 4 coming out. Same thinking with Mario 3D World. I also think they would rather develop brand new iterations of Mario Kart and Splatoon rather than porting them.