Filming is already underway on Zack Snyder's "Justice League Part One" at Warner Bros. Pictures with various other members of the cast slowly being revealed. Earlier we heard Jeremy Irons is returning to the role of Alfred Pennyworth and promising the next film in the series will be "simpler". Today, actor Jesse Eisenberg hinted that his Lex Luthor from "Batman v Superman: Dawn of Justice" will return for the follow-up.