Like numerous other entries in the DCEU, Aquaman has experienced a number of shifts and changes to its release date since it was first announced. That said, the film has managed to remain far more stable than other DC projects currently on the horizon. The film was originally slated to hit theaters in summer 2018 but was subsequently pushed back to fall and then winter. Now the film will hit theaters on December 21, 2018, and (barring a major, unexpected setback) it doesn’t look like that is going to change anytime soon. That said, this IS DC, so anything can happen at any time.