it has potential, though I feel that your prequel should tell us what happened when leading up to the event you describe. What you describe seems to be telling us what happened about two seconds before Stranger's Wrath starts.
Why does he want to hunt down Bounties?
How did he hide his legs to get into a town and speak to a Clakker?
Of course, if you story is set in the time when all of this was established, then you don't need to cover it...
