In December 2015, The Hollywood Reporter reported that Hasbro Studios and Paramount Pictures were creating a movie universe combining Rom with G.I. Joe, Micronauts, Visionaries: Knights of the Magical Light, and M.A.S.K. Michael Chabon, Brian K. Vaughan, Nicole Perlman, Lindsey Beer, Cheo Coker, John Francis Daley, Jonathan Goldstein, Joe Robert Cole, Jeff Pinkner, Nicole Riegel, and Geneva Robertson-Dworet had joined the writing team for the project. By March 2018, Zak Penn had signed on to write the film's script