Like any filmmaking concept, the multiverse can be an effective tool... or a flimsy excuse to lure audiences in with the promise of nostalgia. As one of the final films in DC’s Extended Universe — and also the first to address its unwieldy multiverse head-on — The Flash had a tall order to fill. The film also serves as a long-awaited solo adventure for its hero, making Barry Allen (Ezra Miller) the key that unlocks DC’s own multiverse of madness.
