FTR, after the October 12th games were announced, I am updating this tracker I did to try to guess the Michigan start time. Again, this is my guess at which network got the first pick for each week, with confirmed/reported picks in green. For reference, Week 7 is the upcoming weekend slate of games.
W1 - FOX (PSU at WVU), NBC (FRST at MICH), CBS (AKR at OSU)
W2 - FOX (TEX at MICH), NBC (CU at NEB), CBS (ISU at IOWA)
W3 - FOX (BAMA at WISC), CBS (ND at PUR), NBC (IND at UCLA)
W4 - CBS (USC at MICH), NBC (IOWA at MINN), FOX (MARSH at OSU)
W5 - NBC (ILL at PSU), CBS (WISC at USC), FOX (MINN at MICH) ... really not sure on #2 and #3 here
W6 - NBC (MICH at WASH), CBS (IOWA at OSU), FOX (UCLA at PSU)
W7 - NBC (OSU at ORE), CBS (PSU at USC), FOX (WASH at IOWA)
W8 - [Illini/Michigan week]
W9 - [Illini/Oregon week]
W10 - FOX (TBD)
W11 -
W12 -
W13 -
W14 - FOX (MICH at OSU)
I actually c hanged my guess for Week 6, in that I now speculate that NBC got the first pick with Michigan at Washington, and CBS got the second pick with Iowa at Ohio State. So that still leaves 5 weeks for FOX, 3 for NBC and just 1 for CBS, with of course many weeks being unknown. In light of that, I am actually now growing pretty confident that Michigan at Illinois will be the 2:30 pm CBS game.