I think we'll get pairs of Pikmin games. 1&2 were something of a piece, not that far apart, somewhat different structures.
3&4 will probably feel pretty close, and I'm curious about how they can further tweak the formula. 3 almost got all the way there finally. Also, I believe 3 had Wii origins? Even if 4 doesn't rock the boat too much a new Pikmim with a big graphical upgrade could be quite something.
To Kairon: Eh, I dunno, I think it's possible to make a good Pikmin game on a reasonable budget. Photogrammetry techniques could do some heavy lifting. The scope of the actual environments isn't huge, so you could spit shine it. The campaigns aren't super long, but they do usually include a lot of side content. They could tilt back toward more generative stuff, like the Pikmin 2 caves.