In “She-Hulk: Attorney at Law,” Jennifer Walters, an attorney specializing in superhuman-oriented legal cases, must navigate the complicated life of Hulk.

The X-Men take on one of their own in a trailer released Wednesday for the next film featuring the mutant superheroes. “X-Men: Dark Phoenix” picks up where last year’s “Apocalypse” left off, with Jean Grey (Sophie Turner) having taken her...