It’s “Up, Up and Away!” for “ Superman: Man of Tomorrow .” James Gunn has revealed the comic book sequel has started production, with the director sharing a photo from set of a chess board and Van Kull Prison badge for inmate A. Luthor (a.k.a. the villainous Lex Luthor), as well as a bag of Ruffles potato chips. David Corenswet is returning as the Man of Steel in “Superman: Man of Tomorrow,” written and directed by Gunn. In the sequel, Superman is forced to team up with his adversary Lex Luthor