I have a hunch that the Big Ten will want to go with a divisionless format in 2022 where the top 2 teams make the CCG.

Right now the Big Ten is working it's way through a 6-year rotation that runs from 2016 to 2021. During that 6-year period, everybody will play everybody else at least 2 times, playing everybody at least once at home and once away. Once that 6-year rotation is done, I think at that point the Big Ten will want to be done with divisions.

So it makes sense that 2022 will be the year that the NCAA changes the CCG rules permanently to allow for the 2 best teams to make the CCG in a divisionless conference. It's just that there will be some specific rules like

1) elligible members must play at least 8 conference games.
2) conferences must have at least 10 football members
3) all members must play all other members at least once every 6 years.