Poor Gojo
Itagaki is impossible imo. He is still too green. Moreover he got trauma after he lost to Imai. He even saw himself moved slow. Maybe he has recovered but from what I saw Itagaki needs a lot of focus to utilize his full potential and the problem is he cannot focus so early in first round.
You mean Woli? Yeah I think with experience he probably could defeat Martinez. Ippo won because Woli was still inexperienced. Even Kamogawa admitted that if Ippo fights Woli again in the future Ippo would have lost.
So it's between Sendo, Miyata or Gonzales. I think Miyata would become WBC champion since he hasn't shown any interest with Martinez. Gonzales would defeat Martinez and Ippo would defeat him in the rematch. Not sure about Sendo. He might move weight class or become world champion in another division.
Ippo then fights Miyata tto unify WBA and WBC belt.