Quite possible. If i'm not mistaken their was only one new first party IP introduced. Horizon Zero Dawn. So all it takes is one (or two) interesting new IP(s).
We know of several sony studios working on unannounced (or not properly introduced) PS4 projects.
Quantic Dream (they are not really first party though)
Bend
Media Molecule
Studio Santa Monica
And i guess "first party showing" includes showcasing already introduced IPs. Like Zero Dawn, Rigs, TLG aso. Haven't seen much of the Last Guardian.
Hunting Season is done...







