CBS is still going to want a noon eastern time zone game, along with a prime time game. Starting P12 games for a noon start mean 9:00 o'clock in the West. But does line up well with a the P12 night game in prime time.
NBC, one would think would like to have a noon and 3:30 games, for when they are not covering ND and one when they are.
ESPN loses the B10 games but picks up the SEC games, along with their current ACC contract, looks like they might also want to continue to pick up a few games from the B12, like they did before. They also want to show a lot of ACC games on the ACC network, which they are paying for.