For me it’s Super Metroid. I have played Zero Mission, Fusion, Metroid: Samus Returns (3ds) and Metroid prime remaster, three of these games are remake/remaster. So you can see why I’m hesitant to start Super Metroid, I’m sure that game still holds up, but playing it with modern controls annd other bells and whistles would be more ideal.
It’s getting a remaster, but also maybe a remake at some point.
Though it doesn’t need a remake nearly as badly as SS did, the remaster could get it pretty close already.