There are fourteen Summons in Final Fantasy 7 Rebirth, three of which will be available right from the get-go. Players will be able to unlock another six as they make their way through the main story, with a secret Summon also available for those who decide to follow a certain quest line to its end. The final four are DLC / Bonus Summons, though it's possible that these will be made available to everyone somewhere further down the line.