Nintendo has never confirmed Kirby Fighters 2, but a listing for it has appeared on Nintendo’s own website.
“Familiar friends and foes like Bandana Waddle Dee and King Dedede also make an appearance as playable characters in the Kirby Fighters 2 game, available exclusively on the Nintendo Switch system.”
The original Kirby Fighters – a last Kirby standing fighting spin-off – first appeared as part of 3DS compilation Kirby Triple Deluxe, before being re-released with extra bits and pieces as a separate 3DS eShop download.
Kirby Fighters 2 looks like it will also be a download-only title, with a $20 price point to match.