I could definitely see a Switch mini release in 2019 for $200. Thing is its gotta still be able to connect to a dock or it won't be a "Switch", and it still needs joycons or else you lose motion which plenty of games will incorporate (and no matter what some people say about motion controls, they are fantastic and a much better way to play for certain types of games). But they could market the mini as a handheld with no dock and no controller grip which would help lower the price, and maybe have a Switch mini dock or something that let it connect to the tv sold separately, and of course you can buy all the other accessories as well.
The thing is they need to keep the height of the mini the same size so that the joycons fit on there. So they could make it less wide and a bit thinner, but they can't get the height down unless they completely abandon the idea of the Switch for a handheld only switch, but without motion controls, hd rumble, the ability to play multiplayer on one device portably it would lose a lot of value simply to be a smaller cheaper handheld only non-Switch, but if it is super cheap and they get the marketing right of clearly showing it is handheld only and does a lot less than the switch then I suppose there'd be a good market for it.
I do think the Switch is pretty much the ultimate device for Nintendo. Maybe they will make a Switch 2 that is much more powerful, but in general I see the Switch form being their last major console remake and them just providing updates and new version to it for the foreseeable future.







