Rockstar probably isn't planning to slip any sneaky cut content from its previous games into GTA 6, says GTA 5 producer John Ricchio, though the developer has done it before.
Ricchio tells Kiwi Talkz about Rockstar's approach to cut content in a recent interview, "If the tech is fundamentally the same, or similar enough, you can sometimes plop it in as like, 'Hey, let's just see how this works.'" Ricchio specifically remembers Rockstar adding "some" missions from a cancelled, unannounced game into GTA 4, "which was kind of cool."