Was expecting a Moondog reveal
He has to be connected to the Copelands. He looks a hell of a lot like Josh, and he had the same RV.
With all the time travel and alternate dimensions, I was expecting some kind of explanation of who he was, such as:
-Alternate dimension Josh.
-Josh's father/grandfather/uncle
-Josh's alternate dimension father/grandfather/uncle
-Future Matt.
-Alternate dimension future Copeland kid besides the 3 from this dimension.