I thought the original Resident Evil 4 was appreciated from the very beginning? At least, it appears to have consistently featured in the countless lists of "best video games of all times".
Anyway, I agree that the older titles are probably next. In which order though? Code Veronica should have come after 3, and yet they went for Resident Evil 4 straight away, so I hope they don't forget it. Despite my fond memories of playing its coop mode with friends for countless hours, Resident Evil 5 was a meh game that copied its predecessor with little to no inspiration, so there's potential for a big remake, even an overhaul here. As for Resident Evil 6... there's pretty much nothing to keep here. Even a perfect gameplay will never make up for the sheer amount of goofiness in the game's story, so I'm not sure how they'll approach it. And then, RE7 is what revived the series, and piloted the engine used for the remakes, so definitely not a candidate. Or, the first Resident Evil 1 remake being almost 22 years old already, there's really nothing wrong about a remake of a remake. And Zero could follow, that game had a lot of cool stuff too. Let's see what they decide!