Yesterday we learned which Arrowverse heroes would appear in The Flash's crossover-like "Armageddon" event, and now it's time to find out who the identity of the big bad.

EW has confirmed that the psychic DC Comics villain Despero is the alien threat that forces Barry Allen (Grant Gustin) and the rest of Team Flash to call on Black Lightning (Cress Williams), Batwoman (Javicia Leslie), and more for help in the five-part event set to kick off The Flash season 8.