Other than Demon's Souls (the one thing that makes me wary of that is the term "reimagining" they used -- Demon's Souls is perfect for the kind of remake Colossus got), Syphon Filter and SOCOM are plausible in my opinion. Both of those franchises, especially Syphon, make more sense for a "reimagining", a sort of reconfiguration of the formula of each game.
Syphon hasn't been on home consoles since the PS2. Personally I imagine a new console Syphon Filter game assuming a position in Sony's stable somewhere in-between Uncharted and Metal Gear. Metal Gear as we know it is concluded and Death Stranding seems like something totally different. With Splinter Cell also on hiatus, there isn't really a flagship stealth franchise right now, and that kind of game slips right into Sony's favoritism towards third person action games. Ideally it'd feel like a next-gen successor to MGSV (both Ground Zeroes and Phantom Pain I guess). But is Bluepoint the right company to make that game?
SOCOM was mainly successful as a competitive shooter, which is something Sony doesn't really have in its first party stable. The closest thing Sony has are Uncharted and Last of Us multiplayer, and how successful are those really? I could totally see Sony bringing back SOCOM as an esports shooter and developing it like its own version of R6 Siege.