The CW released the final trailer for its upcoming "Crisis on Infinite Earths" crossover.
The trailer shows the last remaining Arrowverse heroes who were not killed during "Part 3" taking on the Anti-Monitor and his minions while also offering a new look at Oliver Queen as The Spectre. Additionally, the footage may tease the return of some of those fallen heroes, as a few characters who die appear in the footage and seem to be involved in the battle.
According to the synopsis for "Part 4,"
OLIVER HAS BECOME SOMETHING ELSE IN PART FOUR OF “CRISIS ON INFINITE EARTHS.” EPISODE PENNED BY MARV WOLFMAN & MARC GUGGENHEIM – Stuck in the Vanishing Point, the Paragons search for a way to escape. The futility of the situation is compounded by The Flash’s (guest star Grant Gustin) disappearance. However, hope appears in the form of Oliver (Stephen Amell), who reveals that he has become something else. Meanwhile, the origin stories for The Monitor (guest star LaMonica Garrett) and Anti-Monitor are revealed. Glen Winter directed the episode written by Marv Wolfman & Marc Guggenheim.
"Crisis on Infinite Earths" will return after the winter hiatus. The crossover will conclude on Tuesday, Jan. 14 on Arrow at 8 p.m. ET/PT and in DC's Legends of Tomorrow at 9 p.m. ET/PT. The Supergirl, Batwoman and Flash episodes are now available to stream on The CW.