If you look at the most recent rankings, 5 - McNeil, 6 - Johnson, 7 - DeMilio, 8 - Lamer.
If (when) some of the B1G gents lose (DeMilio included) they will drop. The coaches aren't some super 'pristine' rankings committee and opinions are effected in losses - especially manner of losses. If Johnson and Lamer win out, I think they pass by the B1G 3rd in coaches ranking and McNeil. At least one of them, if not two of them (again manner of victory/loss are more greatly effected in the coaches rankings than anywhere else).
So by the time the final coaches ranking comes out, assuming current rankings are how they finish at conferences, I think we are going to see... (in the coaches ranking)
1 - Henson
2 - SVN
3 - Parco
4 - Johnson
5 - Lovett
6- Lamer
7 - McNeil
I wouldn't be surprised to see Johnson also jump Parco, or Lamer jump Lovett, either, as wins and losses do skew optics, and the coaches ranking is by human coaches.
I do think that Johnson jumping Parco absolutely will not happen, even if Parco finishes 2nd at B1Gs. He wins the RPI battle (as of now) as well as I don't think Johnson passes him in the CR either (again optics - Johnson wins close matches, always).