Ridge Racer would be perfect.
I would unabashedly say this but after getting a AC7 after a failed rebranding like RR did, I have faith it could come back by Namco Bandai.
Anyway, new IP I say. They earned it.
If I had to choose a classic:
Parasite Eve
Silent Hill
Alundra
Vagrant Story
Legend of the Dragoon
Legend of Legaia (just me... ok)
I'd say Silent Hill probably would be the best fit, or MGS if they could wrestle it away from Konami. Dunno if these 60 hour RPG's would be in there wheelhouse but hell if I'd like to see them try. PE is my most wanted PS1 remake though, I feel like it could come back as a dominant force, as long as they keep the people who made 3rd Birthday the f away from it.