Because of competition for limited visual effects post-production capabilities in the post COVID revival, Warner Bros. have delayed several big DC titles.
Note that the dates below are for the US. New Australian release dates haven't been published yet but they're usually not far off US ones.
Delays:
Shazam! Fury of the Gods has jumped forward from June 2, 2023, to December 16, 2022 which interestingly pits it instead of Aquaman against Avatar 2 which releases the same day.
Meg 2: The Trench has also been given an August 4, 2023 premiere date.
[ Main Image: Aquaman. Credit: Warner Bros. via IMDb.com. ]
Pedersen, E. & D'Alessandro, A. (March 9, 2022). Warner Bros Release Dates: ‘The Flash’ & ‘Aquaman’ Moved To 2023; ‘Wonka’, ‘Shazam’ Sequel & Others Shift – Updated. Deadline.