Not a new Nintendo console, mind you, but a new version of an existing one: It looks like Nintendo is already deep in development of a new version of the Nintendo Switch.
Rumors point to logical upgrades like a brighter screen, better battery life, and slimmer profile — Nintendo has yet to say anything officially.
That said, Nintendo has a long history of iterating on its game consoles.
There are several different versions of the Nintendo 3DS handheld, for instance, some with more horsepower and bigger screens than others. The same could be said for the Nintendo DS before it, and the Game Boy Advance before that.
More than just a rumor, it's entirely likely that Nintendo will release new iterations of the Nintendo Switch. And 2019 is said to be the year that we'll see the first of those iterations.