New Rage DLC entitled Rage: The Scorchers may be on its way. PEGI, the European video game content rating system, lists ZeniMax and Bethesda as European publishers in the filing, which leads us to believe that this is some Rage content that didn't make it in to the final cut of the game.
We've known about the Scorchers for a while now though. They're one of the six bandit clans in Rage and they were the only one cut from the game. We've even seen screenshots of them, like the one above, so it definitely likely that they'd come out in some sort of DLC or expansion pack.
Keep in mind id Software hasn't confirmed the release of The Scorchers DLC, but if they do we'll keep you updated.