Spoiler alert! We're discussing key plot points and the ending of Marvel's "Captain America: Brave New World" (in theaters now), so beware if you haven't seen it yet. Look out, world. There’s a new Hulk in town.

As the new Captain America, Mackie was perhaps doomed from the start. And yet, he lacks the megawatt magnetism to elevate, or even just obscure, the poor construction of a tentpole franchise on his own. He is a far better actor elsewhere, but here his stand-alone avenger and the bad blockbuster only show the loose seams.