The only DCEU title that’s being released in 2019 is David F. Sandberg’s Shazam! in April, but we also have Todd Phillips’ Joker arriving in October; Cathy Yan’s Birds of Prey (And the Fantabulous Emancipation of One Harley Quinn) coming in February 2020; Patty Jenkins’ Wonder Woman 1984 scheduled for June 2020; Matt Reeves’ The Batman penciled in for June 2021; and James Gunn’s The Suicide Squad on the docket for August 2021.
Warner Bros. has not yet announced when they plan on releasing Aquaman 2, but it will likely be a few years from now as they have a nice slate for DC projects lined up between now and the end of summer 2021.