Based on recent rumblings on the interwebs that Texas is a serious expansion option and they'd like to bring Oklahoma on board as well, I decided to put together a 5 team pod system for the Big Ten based entirely on geography with the hypothetical additions of: Texas, Oklahoma, Kansas, Missouri, Virginia and North Carolina to bring the conference to 20 teams.
East:
Penn State
North Carolina
Maryland
Virginia
Rutgers
Mid East:
Ohio State
Michigan
Michigan State
Purdue
Indiana
Mid West:
Wisconsin
Iowa
Illinois
Northwestern
Minnesota
West:
Texas
Oklahoma
Nebraska
Missouri
Kansas
Then I ran a schedule for Ohio State using a 9 game conference schedule, playing every team in their pod every year, and with the East and West pods most loosely associated (meaning the teams from the East and Mid East pods only play one team from the West pod each season and vice versa).
Using that formula it would take 5 years for every team in the conference to play every other team in the conference.For example-
Year 1
Ohio State: Michigan, Penn State, Michigan State, Purdue, Indiana, Minnesota, Northwestern, North Carolina, Missouri
Year 2
Ohio State: Michigan, Michigan State, Purdue, Indiana, Illinois, Iowa, Maryland, Rutgers, Kansas
Year 3
Ohio State: Michigan, Penn State, Wisconsin, Nebraska, Michigan State, Purdue, Indiana, Minnesota, Virginia
Year 4
Ohio State: Michigan, Oklahoma, Michigan State, Purdue, Indiana, Northwestern, Illinois, North Carolina, Maryland
Year 5
Ohio State: Michigan, Texas, Wisconsin, Michigan State, Purdue, Indiana, Iowa, Rutgers, Virginia
Or something like that, it gets a lot more complicated when you run multiple teams, obviously.
However, I think overall this would be a very workable system that sets up competitive balance relatively nicely.
It also protects historical and regional rivalries and affiliations (West is Big 12 lite and East is ACC lite while the Mids are classic Big Ten) as well as spacing out the times the geographically separated teams would play one another.
My biggest problem is that Penn State is gift wrapped their pod (the mid-west is relatively weak as well and the West and Mid East are stacked) and I'm sure they would love this set up, but trying to balance the divisions any other way gets impossible extremely quickly without completely blowing up the historic and regional affiliations.
If mega conferences are in the future, I'd be extremely happy if the Big Ten ended up with this arrangement.
Also, if you had four mega conferences with 4 5-team pods, you could have the pod winners play, have the winners of those games play in a conference championship game, then have the conference champions in a four team playoff.
It would effectively be a 16 team tournament.
One can dream.