Alundra isn't a Sony property, is it? Honestly, if it were remade, I'd like to see it hit all platforms, especially with others being more likely to let me keep the game playing on my console in the future.
I don't really think games from non-sony pubs NEED to be PS5 exclusive. I don't like how weakly Sony sticks with it's more ambitious, fun ideas. I feel like they'd only make that ONE project, then go back to God of Wars and Days Gones.
Having said all that, the only pure SONY thing I can think about, that I'd be okay with a "Just One More!" would probably be Omega Boost. I definitely enjoyed it, there's not too much 100% like it, and it was the kind of silly experimental stuff that I liked back in the PS1 days.