I will die on the hill that there is a 0% chance we are not getting a PS5 / PC version of this game. It would make so much money on PC right now.
They just remade Demon's Souls which is about a third as popular and are putting everything else that was popular on PS4 on PC, it's going to happen one way or another. It's likely lower priority since there isn't an active team internally that "owns" (oversees) the code and would likely take more time to get it up and running logistically vs. Spider-Man, Uncharted 4, etc.
There is always the chance that once Demon's Souls is on PC they wouldn't want to do Bloodborne unless it's a remake as well. That's a good way to piss off hardcore fans of the original no matter how faithful it is, so seems like logical route for Sony to go.