Announced at Comic-Con International today according to Deadline:
Brandon Routh, star of Superman Returns and DC’s Legends of Tomorrow, will reprise his role as Superman in The CW‘s upcoming “Crisis on Infinite Earths” crossover event, producers announced today at Comic Con International in San Diego. This will be Routh’s first time in a Superman costume since Bryan Singer’s 2006 movie, in which he starred as Superman opposite Kate Bosworth’s Lois Lane and Kevin Spacey’s Lex Luthor. In a twist of fate, last year Bosworth appeared in a post-apocalyptic thriller called The Domestics alongside current Arrowverse Superman Tyler Hoechlin.
“Crisis on Infinite Earths” will air in December and January on The CW. The storyline will pay off plot threads seeded since the first episode of The Flash and play heavily into the final episodes of Arrow, setting up a new status quo for the post-“Crisis” Arrowverse. Taking place in five episodes over two quarters, “Crisis on Infinite Earths” will bring together the characters from Arrow, The Flash, Supergirl, and DC’s Legends of Tomorrow in their biggest and craziest story yet.
Written by Mark Waid and Alex Ross, Kingdom Come was a four-issue comic book series published under DC’s Elseworlds imprint. Set in the year 2020, Kingdom Come follows an older Superman as he attempts to rein in a new generation of reckless vigilantes and inspire them to adopt the ideals of past superheroes.