Games I'd like to see:
A "Zelda Souls" game developed by From Software.
A 2D Metroid game developed by Artplay (makers of Bloodstained: Ritual of the Night) or the guys who did the original Samus Returns fan project.
A 2D Mario game from the developers of Sonic Mania
A Punch Out!! game developed by Imagineer (Fitness Boxing).
An Advance Wars game developed by Chucklefish (Wargroove).
Those sound like they'd be great! ^^ I was thinking maybe a 2D Metroid by WayForward, but I doubt WayForward could pull off something with a darker look and feel than Shantae.
Anyway, I'd also like to see a Diddy Kong Racing reboot by Sumo Digital (Sonic & All-Stars Racing Transformed), a new Mario RPG by Square Enix, a Soul Calibur-esque Zelda fighting game by Bandai Namco, a new Earthbound by Atlus (Persona series), and a new Kid Icarus by Bandai Namco.