If Prime Video’s “The Boys‘” slow submission to superhero franchising’s demands over the course of its four years on streaming has left your stomach roiling, slam a shot of Pepto-Bismol and relax; it’s part of the routine. Superhero projects are nothing if not designed for easy spin-offs, an expectation codified in contemporary television and movies 10 years ago when “Marvel’s Agents of S.H.I.E.L.D.” premiered on ABC and initiated the second phase of superhero Content™’s ruthless campaign against all other extant forms of visual storytelling.
