MHW is going to hit the 10 million mark easily with its current trajectory. I doubt Splatoon 2 will hit that mark and Horizon won't hit that mark either. Zelda could end up doing 15 million.
R1 A Splatoon 2
R1A B MHW
R2 both MHW
R3 both MHW
R4 BOTW
Please excuse my (probally) poor grammar