Sony could just "kite" out the rest, their lineup is still strong going into in the launch of the PS5...
However I doubt they do that, I bet theres still abit more in the tank.
I don't. It's not like Sony only has one or two titles until the PS5. They have 3 SIE Worldwide studio games coming out, 4 first party titles, and 1 major third party exclusive (don't know if Sony own Death Stranding as an IP or not, but if they do that's 5 first party titles then).
It's much more likely, honestly, that Sony only has one, or two cross-gen releases at most, especially if the Playstation 5 is backwards compatible with Playstation 4. I think Ghost of Tsushima will definitely be a cross-gen release on launch, and the only other title I think that will get an official Playstation 5 version is The Last of Us 2, which I don't even think would be a cross-gen release so much as a remaster 6 months or so after release. It's the last first party heavy hitter to release before the Playstation 5 comes out, so it won't be cross-gen at launch like Tsushima probably will be.
Third parties are much more likely to keep doing cross-gen releases well into the Playstation 5's early life.