Remedy is a very unique company. I wouldn't be surprised if they were purchased by Sony or one of the other bigger fish. However, I like that they are independent and make very unique games.
True, their highly narrative heavy single player third person games seem a natural fit in the WWS portfolio.
On other hand they could be a natural acquisition for a company who doesn't have that dna too, to expand the sheer variety of their offer.
It's a studio acquisition that would make sense in a lot of ways. I think that affinity would play a major role anyway so I believe in a move from Sony rather than Microsoft (the other company that, I think, would be interested in that kind of experiences, even if for different reasons - i.e. portfolio variety, game pass, collab. history).
I think that the partnership with Microsoft didn't work out too well, Alan Wake and Quantum Break franchises aren't big IPs and essentially were dropped from the publisher so I don't think Microsoft would be too mad about losing Remedy for good.
Sony oh other hand, with PS4 showed a certain "touch" with single player third person experiences, they are in a position where an high budget Remedy game could work financially and commercially. It more about environment and ecosystem, and I think that Sony could be a good partner for Remedy. I honestly can't think another videogame company with a portfolio more suitable than Sony for Remedy.
Right now I'm a believer, but let's see
PS: Despite the freedom of indipendency, a true AAA blockbuster budget game from Remedy isn't easy in our time