I don't think they would do a six division alignment. The league perfers the first two rounds to be within divisions to reduce travel vs a conference playoff system.
Brampton, Maine, Newfoundland, Trois-Rivières, Worcester, Adirondack, Reading, (expansion )
Wheeling Cincinnati, Fort Wayne, Indy, Kalamazoo, Toledo, (2 expansions)
Atlanta, Florida, Greenville, Jacksonville, Orlando, South Carolina, Norfolk, (expansion )
Allen, Iowa City, Kansas City, Tulsa, Wichita Idaho, Rapid City, Utah
In the short term they might stick Iowa in the midwest to balance the divisions while continuing to play an unbalanced schedule.
Might be some movement depending on the expansion teams - Norfolk could end up with the north or the midwest, depending on where the four new teams come from. Of course this is all based on the assmption that no one fold or moves before four teams are added (unlikely).
In another "what if" scenerio, maybe 20-21 becomes a lost season, a few teams fold in both leagues causing the SPHL to collapse, and the remaining teams join the ECHL, adding two net teams to the midwest, and two to the south, with Norfolk pushed to the North to even it out, and we start 21-22 with a 32 team ECHL (also not likely)