Some of the big takeaways are that they do in fact have multiple schedules set out and that "bubble divisions" are very possible to start. Assuming the divisions are going to be similar in size to the US one, they could have something like:
Erie/Flint/Saginaw
London/Windsor/Sarnia
Kitchener/Guelph/Owen Sound
Soo/North Bay/Sudbury
Mississauga/Hamilton/Niagara/Barrie
Kingston/Ottawa/Peterborough/Oshawa
It seems a bit ridiculous to play the same 2-3 teams possibly all year, but if they really want to play, this might just have to be the reality for now.
Will not happen divisions will stay the same as they've always been the OHL hasn't announced anything concrete but 6 divisions were nor talked about realigning the divisions for the season.
Talks had happened 2-3 weeks ago involving all the teams, and from Owen Sound GM DD stated that we will see no cross-conference games for 2020-21 nor overnight trips. Now from what you stated Owen Sound and Barrie are a lot closer to each other.
If the divisions were to realign for a season of would look closer to this.
Owen Sound, Barrie, Guelph, Kitchener,
London, Sarnia, Windsor
Hamilton, Niagara, Mississauga
Kingston, Oshawa, Ottawa, Peterborough
Erie, Saginaw, Flint
N. Bay, Sudbury, SSM
Unfortunately the only divisions that wouldn't change would be the east too much cause of Ottawa.
Even playing every other day which is likely to happen that till leaves the question of if so what weeks will be home weeks for teams and which will be road weeks cause you can't deny that the league will be pressing to test teams regularly and quarantine players if the have tested positive which means does the league increase the player cards for teams to accommodate those each players who maybe stuck not playing and isolated waiting for some player to show positive signs to this virus. So even though that's likely close to what the league will likely be looking at theres really no answer to what will be the final answer by the league.