You Have To Play INTERmission Before FF7 Rebirth

Final Fantasy VII Remake had DLC content that can't be played on PS4, yet it includes important story information that will be relevant to FF7 Rebirth. The FF7 Remake INTERmission DLC stars Yuffie Kisaragi, as she infiltrates Midgar during a covert mission that happens alongside Cloud's story. Yuffie is the only playable character in her DLC, though there is a guest party member called Sonon, who fights alongside her throughout her story.