Brandon Routh, who once played the Man of Steel in 2006's Superman Returns, will once again don the red and blue tights for the Arrowverse's next crossover event, Crisis on Infinite Earths. Routh currently stars as Ray Palmer, aka The Atom, in DC's Legends of Tomorrow.

Deadline reports the announcement is expected to be made later today at Comic-Con International in San Diego.

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Routh is reported to play both Clark Kent and Ray Palmer, along with joining a returning Tyler Hoechlin as the Men of Steel. At this time, it's not known what episodes Routh and Hoechlin will appear in.

The reveal of Routh as Superman could be the major announcement former Arrow showrunner Marc Guggenheim teased back in June. "Don't be surprised if we announce something pretty cool at SDCC," he wrote on Twitter.

"Crisis" will be split into five parts, with each Arrowverse show providing a piece of the story: Arrow, The Flash, Supergirl, Legends of Tomorrow and Batwoman. Spanning a whopping five hours, the crossover will air across two quarters, which indicates it will be split over the winter hiatus.

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Slated to air in Fall 2019 on The CW, Crisis on Infinite Earths currently has no announced air date.