Metroid over any other Nintendo franchise really is the perfect series to port over to PC.
Metroid sales are never as high as Zelda or Mario, and Nintendo really could make those numbers higher by bringing it to PC.
Considering Metroidvania is a popular genre of game, why not bring the flagship game that developed the genre first here!
This game used motion controls that probably would work better under a mouse and keyboard if not a game controller.
Finally if the MP2 and MP3 games aren't getting a remaster like the first did what better way to bring some good will to Nintendo customers, and potential customers on the PC by porting them here.