James Gunn comments on the 5 year time gap between 'THE BATMAN' and 'THE BATMAN 2':

"To be fair, a 5 year gap or more is fairly common in sequels. 7 years between Alien and Aliens. 14 years between Incredibles. 7 years between the first two Terminators. 13 years between Avatars. 36 years between Top Guns. And, of course, 6 years between Guardians Vol 2 and Vol 3."