F-Zero. Saved you a click.
This is all speculation and dependant on a “reliable leaker” do take it with a huge grain of salt until it’s been announced. It’s been 19 years since the last F-Zero entry.
The same ‘reliable leaker’ has leaked three separate directs, Mario Wonder, Mario RPG remake, Detective Pikachu, and a ton more.
If it is F-Zero, and it is true that Nintendo showed off their new hardware at Gamescom, I wouldn’t be surprised if the new F-Zero game is a launch title for the new console. F-Zero would make a good title to show off improved graphical and processing power, especially if the new console is supposed to keep up with the Xbox Series/PS5.
I never expected them to make another one, F-Zero is a game with a steeper learning curve than Mario Kart and people bitched about how hard GX was.