The newest entry in the DC Extended Universe, “Black Adam,” starring Dwayne Johnson, has been hyped as a “new phase” and a “change in the hierarchy” for the embattled comic book franchise, but that doesn’t mean there hasn’t also been cause for concern. The trailers have looked ponderous and gray, and though the film is directed by the auteur of many lively Liam Neeson actioners, Jaume Collet-Serra, his prior outing with Johnson, “Jungle Cruise,” left his signature verve behind. But, it seems Collet-Serra has got his groove back for “Black Adam,” or perhaps he was saving up said groove for this…