I'll go with my theory that the successor will be marketed first as a pro model for the Switch line. The Switch still got juice to receive some heavy exclusives, like the next mario kart wouldn't hurt the successor if it is released on Switch, they can later add Dlc exclusive content for the successor for example.
Imagine this situation: the gamers that been following the recent news and rumors could perceive the pro model as the potential successor, the momentum that would be generated in the stores can be huge, some parents that are looking for gifts will see the fuss and maybe grab a switch since the entry price of the successor can keep them away, giving a small boost for the Switch.
I kinda suck with predictions and maybe my reasoning of the successor using a pro illusion to keep a small pace of exclusive content in its first year or two isn't that good for the 160M goal, but we will see.... or not.
We reap what we sow
