From Sendo's explanation I thought Itagaki, Hoshi, and Imai's different styles worked like rock paper scissors, but damn never mind that, Imai seems to be the final boss rather than a rival for Itagaki.
The series is getting really busy, although Sendo's hands recovered already, I'm expecting a few minor fights before we get to that (we just finished Takamura's fight, we don't usually get two major fights back to back).
Assuming Hoshi vs Imai is really over, Mashiba's fight is upcoming next, after that maybe Itagaki will get some action (it's been a while for that).
Also I wonder what will happen with Miyata, it seems like he's at his limit, is he really gonna move on to a different weight class?