https://www.pcgamer.com/rage-2-wont-support-mods-at-launch-but-may-in-the-future/

Id Software game director Tim Willits is fond of saying that "you can drive anything" in Rage 2, so when we talk at QuakeCon I ask him about the mech being piloted by a enemy faction boss in the gameplay trailer. 

"Oh yes, yeah," Willits says. "That guy's awesome."