Here is my thinking (could be missing something!) on Wisconsin et al.: Wisconsin is currently 3-1 in B1G play with 5 games remaining. In scenario in which Gophers win out except for OSU (i.e., we beat Badgers in final season game), this means the Badgers beat Indiana, Northwestern and Nebraska and lose to OSU and Gophers, resulting in a final B1G record of 6-3. Also in this scenario, the Gophers, who currently sit at 2-2 in the B1G with five games remaining, beat Michigan State, Illinois, Purdue and Wisconsin, and lose to OSU, resulting in a final B1G record of 6-3, tied with Wisconsin—but we have the tie-breaker, having beaten Wisconsin.
Iowa is nominally in the driver’s seat, sitting at 3-2 in the B1G with only four games remaining: Northwestern, Rutgers, Illinois and Nebraska. If Iowa wins three and losses one of the remaining, its final B1G record will be 6-3, tied with us and Wisconsin (in this scenario), but we win, having the tie-breaker over Iowa. I personally think Iowa’s offense is so broken that it will lose at least two of its remaining four games, which, in this Gophers-win-out scenario, would drop Iowa out of contention, leaving the West to Wisconsin and Minnesota.
(BTW, I have ignored Nebraska, but it sits at 2-2 in the B1G with 5 games left. In my scenario above, if Nebraska wins all five of its games, it would win the West at 7-2. If Nebraska wins 4 and losses one, it finishes 6-3, but we hold the tie-breaker over Nebraska as well. If Nebraska goes 3-2 in its final games, it is probably out of contention. This is the Wild West at the moment!)