Metroid F-zero. Where Samus and captain Falcon meet and fall in love, despite a brainsucked samurai Goroh attempting to thwart them. Gameplay will consist of running, gunning, rolling and driving really fast.
think about this...this'll make perfect sense:
-both feature a heavy sci-fi theme with fancy colored lights and lots of metal and robots
-Samus and Falcon are both loners with a fascination for tech and danger, so they'd make a perfect match. Their reunion would be unlike anything the video game world has ever seen.
-racetracks you can both do in a hyperfast f-zero machine, or attempt to speedrun the thing while tumbled up in a ball as Samus.
-nintendo would shut up two groups of crying fanboys at the same time
And since this nintendo direct will focus on spring releases, they'll announce the release date to be the end of March.
Yeah...speculation can be fun if you don't attempt to make a realistic guess.