“Aqaman and the Lost Kingdom” next May.The follow-up finds much of the original cast – including Amber Heard, Willem Dafoe, Patrick Wilson and Yahya Abdul-Mateen II – reprising their roles, with Ben Affleck also making an appearance as Bruce Wayne/Batman.While the Marvel Cinematic Universe got off the ground fairly smoothly, solidifying itself as a well-oiled machine by the time they got to 2012’s “The Avengers,” the interconnected universe of DC films has had a tougher time taking liftoff. Originally, the “DCEU” as it’s called was being shepherded by Zack Snyder, but after the disappointing critical and commercial performance of “Batman v.