Brolin's casting follows the news of Zazie Beetz of "Atlanta" being cast as Domino in "Deadpool 2."
According to THR, the Hail Caesar star is signed on for a 4-picture deal, which will likely include an X-Force movie and possibly a solo spinoff. John Wick'sDavid Leitch is directing the untitled sequel, which was written Rhett Reese and Paul Wernick, who wrote the first installment.
Cable plays the straight man to the wisecracking Deadpool in the Marvel comics. A specific release date for this movie has yet to be announced.