Fay/Miyu
This one is loaded with technicalities: officially, these two Star Fox characters only made their debut last year in Star Fox 2 on the SNES Classic, and by that same token, they actually have already made their comeback after more than twenty years of nonexistence. But specifically then, said comeback is actually their sole appearance, and… and… good gracious. It’s a paradox complex enough to make your head explode. We apologize for the mess.
Now that they’re finally off the schneid and have an actual title under their belts, we can all begin to speculate as to whether they will be present in some capacity in the next Star Fox game. Nothing is assured of course, considering that they are two reboots away from the present continuity, but at the very least, they could have a guest starring role as allies to the squad, in a similar capacity to Katt or Bill. They’re fairly blank slates on the personality front; we know that Fay is the daughter of a family of aristocrats, while Miyu blows lovely kisses, and that’s all very nice. Feel free to extrapolate that as you will: perhaps one of them could be the last surviving member of her race, have telepathic powers, and wield a staff. She’ll also double as Fox’s love interest, and probably have an English accent. That should be a formula for success!