I'm pretty sure we will see another Pikmin game because Pikmin 3 ended on a bit of a cliffhanger.
Now when the game actually comes out is left up to Nintendo. If Miyamoto steps down this year then it will take them longer, but I am sure a fourth game will come out at some point.
As for the sales, 750k on a small userbase isn't bad at all. The game at least broke even for them.








