So the dude their looking for/stole from is an Iron Fist.
Orson Randall wore what Danny has on in that final scene. And the pistols are what Orson uses as well.
In the comics, he shows up at Rand to help Danny out and explain the legacy of the Iron Fist. In a nutshell. It was a great story arc and I guess that's what they're doing for next season (that's why the pirate lady is mentioned), but I don't trust these niggas to pull it off.