That 15 months of inactivity isn't gonna help Yuri. Still, at his age, he doesn't have time to waste. So no interim fight. First, I'll be curious to see how sharp he is next weekend.
If it happens, though, Broner KOs Gamboa in 9. He has every physical advantage including reach. Mini-Tyson or whatever, I don't see Yuri steamrolling The Problem ever (although I'd love to see someone put Broner on his azz to see what he's got inside).