In a Q&A session with investors at Nintendo's most recent financial conference, investment advisor David Gibson said that Switch consoles "have just come to the middle of the life cycle."
That said, Nintendo is not planning to develop new consoles just yet but will continue to launch more games for the Switch.
Switch hosts officially go on sale in 2017, thus estimating that Nintendo may at least plan to make the Switch Battle until 2023 before considering the next generation.
And 6 years a life cycle is also considered normal, the previous Wii host was released in 2006, in 2012 by the Wii U successor. The NDS, on the other hand, was released in 2004 and was succeeded by the 3DS seven years later in 2011.
Of course, Nintendo can also follow the example of Sony Microsoft, engage in a host of intergenerational upgrades, launch a high-configuration version of the host, so that the entire life of the platform last one or two more years, but with Nintendo's usual maverick, this may also be just wishful speculation.
The Nintendo Switch, while less powerfully configured for hardware than the Xbox One and PS4, has enjoyed success with strong exclusives and brand appeal, most recently with Animal Crossing, which has even driven up host prices.
Even EA, which had said it would not release games for the Switch, has announced that it will release a number of games for the Switch this year.
Nintendo had said in January of this year that they would continue to enhance the appeal of the Switch and expand the user base.