At Bethesda's E3 2019 conference, DLC for Rage 2 was revealed. The expansion is called Insanity Rules. In the reveal trailer, we see that the new expansion will include new cheats, a pilot-able mech, new enemies, new vehicles, and new gameplay modes. No release date has been given at the time.
Rage 2 is available now for PC, PlayStation 4, and Xbox One.