There are no “end credits” at a Broadway show. The credits are in your hand when you enter the theater, often in a playbill. But in a world where Marvel and DC love to tease film fans with surprise scenes at the end of their movie, we can think of no better phrase than “ end credits scene ” for what happens in the new Broadway musical, The Lost Boys. What follows is an absolutely massive spoiler for the show, so if you plan to see it—and we highly recommend you do —don’t read any further. Just be sure not to leave the theater before the curtain call ends. But if we’ve piqued your curiosity, and we’re guessing we have, let’s head to Santa Carla and the world of The Lost Boys. T he Lost Boys on Broadway ends very similarly to the 1987 film it’s based on . Michael Emerson kills the vampire David but then realizes he’s not the head vampire. Lucy’s boyfriend, Max, then comes in, and despite the fact that he passed early test, it’s now revealed he is, in fact, the head vampire.…