I don't think it needs a remake, it's only 10 years old
Demon's Souls is a great game, and if they can get that running in 4k at 60fps with shorter loading times, that will be the definitive version of the game
In my opinion it's completely unnecessary to take a game barely a decade old and remake it from the ground up, it's a waste of time and resources and if it's passed onto someone else, it probably won't eclipse the original
In my opinion SOTC was also a redundant remake, it's not eclipsed the original (or the remaster) and the remaster still looks and plays great
I much, much prefer remasters that become the definitive way to play a classic game, to someone else remaking a game from the ground up
Imagine if Bloodborne was instead a Demon's Souls remaster, or imagine that the upcoming DMC5 was instead a remake of DMC1. Both of those scenarios would suck. I'd much rather have a definitive remaster and then a new game, in every single situation
Same goes for Zelda. I'd have preferred a definitive Link's Awakening on Switch (switch from GB to GBC version with a toggle, map items to spare buttons, no repetitive messages etc) and then a new top down Zelda game with the new art style, a game free from the constraints of a perfectly playable older title
It's great we're getting Link's Awakening, but it would be greater still to get the classic game in a better state and then a brand new Zelda game
If they were going to remake Demon's Souls, I'd rather they instead get whoever was going to make it to do Demon's Souls 2 instead and then remaster Demon's Souls 1