Recent reports indicate that Sony is accepting pitches for new entries in classic PlayStation franchises and considering collaborations with external teams. Killzone, Sly Cooper, and Ape Escape are all under discussion, though it remains unconfirmed which proposals will become actual games.
This information comes from a leaker who previously revealed the existence of God of War: Ghost of Sparta. Sony may fund these projects while third-party teams handle development; the report cites Sony's internal studios being occupied with existing projects as the reason for seeking external partnerships. These arrangements remain unconfirmed rumors.
Additional rumors suggest that People Can Fly might develop the new Killzone title, with oversight from Guerrilla Games, the series' original creators. However, this does not confirm that the project has been officially greenlit or announced.
Regarding claims that the first batch of projects might debut around the launch of the PS6, there is currently no corresponding list of projects or more specific timeline. Which classic franchises will ultimately receive new entries awaits official announcement from Sony or the relevant teams.