It should be interesting to see what revelations about Star Wars: The Rise of Skywalker come next, especially now that's its on DVD, Blu-ray, and streaming on Disney+. The character wasn't necessarily a looker to begin with, but wowza. But he didn't necessarily get these procedures under the safest circumstances, which has resulted in his somewhat terrifying appearance. It looks like Dengar has gotten a ton of surgical work done to stay alive throughout the years. Of course, it looks like he's largely robotic at this point. Dengar is no exception in this regard, but no one expected him to pop up during the runtime of The Rise of Skywalker, especially considering the years that had passed within the franchise.
Each member of the group has appeared in franchise projects like video games and comics. The Bounty Hunters of the original Star Wars trilogy might not have had a ton of screen time, but they've proven their staying power in the years since its release.