End of 2016
MK7-14.82m
MK8-8.36m
Clearly there are a large number of people who enjoy MK that never got a Wii U so if Switch is a hit among 3DS owners and MK9 doesnt release in next year or two than it has a good chance of selling over 12 million.
When the herd loses its way, the shepard must kill the bull that leads them astray.