A friend and I were talking about the post-Ep 3 stuff, especially the show. He said he wanted to see something about a clone who goes rogue and wants to live free of his programmed constraints and a natural lifespan rather than just the standard 40 years clones get. That immediately got me thinking, what if we have this clone who does tamper with his genetic makeup and gets that longer lifespan and mental freedom he wanted but also gets some severe unintentional medical side-effects which lead this clone to become... Dengar.
I never really liked the EU backstory on Dengar to begin with, so it feels easy to kick much of it to the curb. We know Dengar is a bounty hunter like the genetic donor of the clones, we have seen Dengar doesn't like Boba Fett so the reasoning could be jealousy over Boba being Jango's favored child, Dengar is covered in bandages which could be from the sloppy genetic manipulation (say, perhaps, by a certain freaky doctor who hangs out in sleazy Tatooine bars even? ), and Dengar wears Imperial armor and sports an Imperial rifle which could be equipment he's familiar with.
So, what do you think, why not?