As far as it sounds, I don't think there is goning to be another galaxy....
However considering the mario series is going into it's 25th (or maybe 30th i dunno) anaversery in two years there could be hints to an anaversery canon game.
However considering the mario series is going into it's 25th (or maybe 30th i dunno) anaversery in two years there could be hints to an anaversery canon game.