It seems pretty inevitable that something like this is happening:
FSU, Clemson, UNC, Miami to the SEC
ND and UVA to the Big 10
VA Tech, Louisville, Pitt, NCSU to the Big 12.
The wealthier 2 will have 20 schools and probably stop there. If there were schools in the Big 12 that they believed made them money, they'd already be in those leagues. The Big 12 could add more of the ACC leftovers depending on what TV wants (obviously Cuse and Duke would be great for hoops). The playoffs will be something where you see 4 SEC schools, 4 Big 10 schools, 2-3 Big 12 schools and 1-2 G5. The Big 10 and SEC will stay way ahead financially, secure more playoff spots, but there will be a market for that third conference and it will get a (lesser) seat at the table.
I don't know if those 60+ schools create a new division or not. I'm not really sure it's necessary, or that there's all that much demand for that but maybe there is. But I think this next step is a further solidification of what kind of exists or seems to be in motion now.