Super Mario Odyssey sales momentum have slowed down in comparison to the like of MK8D and Zelda BOTW
14.94 million pcs have been sold and only 5.06 million pcs left.
If Nintendo did a lot of promotion and bundle for SMO I could see it reaches the 20m milestones at the end of 2020.
Surprisingly Zelda BOTW sales momentum isn't slowing down at all especially after the release of Link's Awakening.