Here's how I believe maybe it will go, Ippo will face 2 opponents and win extremely easily in the A Class Tournament by the first round or second round. He fights Imai to get the JBC Title back. Then 7-10 unknown opponents and then Miyata and Ricardo.

We might even get Itagaki VS Miyata too. Itagaki has an OPBF rank.

10 more fights for Ippo to have, in a way, if the story of the side characters is ending, Ippo most likely will have more fights, maybe not, who knows. I just want to see more of Ippo in the ring and great opponents.

Aoki and Kimura get their titles with a few defenses and perhaps retire unless they are still by the end of the series getting a world title.

I believe Sendo will retire after the match against Ricardo, he will be the broken boxer. He is the only character who gets hit so much aside Ippo.

Mashiba will retire soon, as we saw in the "Grim Reaper to the World Arc", either he wins the world title or he loses. I think he wins it and then retires.

For Volg we don't have any story to go on with yet, we might get a hint soon.

Wally after defeated by Ricardo climbs up again to the world rankings and maybe gets the WBC title first to help with his dream or another belt, then retires.

We will only have Takamura, Ippo and Miyata as active boxers by the last arcs/sagas I am guessing.

Miyata vs Ippo might be in the Tokyo Dome, then whoever wins will fight Ricardo.

And potentially Takamura might lose at some point down the line, the eye plot has been so far since 500s, there's something going on, it can't be just trolling from the author, it happens in almost every recent match of Takamura with the whole "weak to left hooks to his right eye". The fight against Keith Dragon had a bigger meaning to me.

Ippo is 26-27 in the current story supposedly. That is the same age when Date Eiji came back to the ring again, he fought 2 opponents, probably in the Class A Tournament, then the Japanese title again. Ippo and Kumi I expect them to get closer, an actual relationship, let them get married already. But a plot that clears her issues is needed first. Unless Aikawa plays a role later for a bit. Remember the paper she gave to Ippo! He dropped it there at the tree with the line next to it.

Juan Guarcia was a difficult fight for Mashiba, the world champion that defeated Juan might be perhaps almost close to the level of Ricardo Martinez. Depending how the story goes and if we even see this fight at all, I am guessing this will be the most difficult fight for his career, if Mashiba loses, he will retire. I believe Mashiba will manage to win by the 10th round. This will be the last match Ippo watches maybe? in which he will return to the ring after. The current events in the manga indicate that Ippo is coming back soon. Ippo within him wants to be back in the ring he just doesn't expresses it yet out loud. From the match with Ricardo VS Wally and Volg's match, the fire will begin to build up. Kumi is the MAIN reason, Ippo is being held back, aside from his personality. We need some sort of character development for Kumi and Ippo, in which we already got some of it with the last match of Mashiba. Ippo will be his second in this.