Hmm. I didn't mention Returnal as its not a 1st party game, and imo it doesn't look like a big seller compare to Sony's 1st party exclusives. It might perform slightly better than Death Stranding. Who knows maybe it'd be a surprise hit. But I think the game would be a hard sell for casual gamers.
While Ratchet & Clank is probably going to sell fine but its not giving me "blockbuster game" vibes. Its more like a family game similar to Astro/Sackboy.
There's also this:
Sony's New San Diego Team Is Working on 'Existing Franchises' - IGN
eXisting franchises though.
as for Horizon 2, I feel like we should have seen more by now. Still no actual gameplay footage. Ratchet and clank has an actual gameplay footage that was released before ps5 was launched and its coming out in June. I'd be surprised if Horizon is released 5 to 6 months after that game. If I have to bet, it is coming out spring or summer of 2022. I imagine games like Horizon and God of war are more impacted by Covid as they are bigger games and bigger games need more time.