I think 90+ meta will be very very hard. Specially considering all the changes that the series has gone through in this installment.
15 million lifetime? No way. I can see it reaching 7-8 million, but 15? No freaking way.
It will be easy. It's almost always the same franchises that score very high, with the occasional surprise (Celeste for example).
"The strong do what they can and the weak suffer what they must" - Thoukydides