In the place of this week’s Marvel’s Agents of S.H.I.E.L.D., ABC presents a self-congratulatory Marvel special that shows how the company emerged from pulp comics to box-office dominance. It’ll be fun if it includes the company’s rare but glaring missteps, like the “lost” film version of The Fantastic Four, or the early, terrible TV versions of such heroes as Nick Fury and, yes, Spider-Man.