It won't be the Wolverines....
...actually it probably will be, unfortunately.
While the B1G West is the easier path, every team with a puncher's chance of winning that division already has. Now if Northwestern can win it twice, then Minnesota, Purdue and Illinois could certainly win it once as they each have a "higher ceiling" than the Wildcats. But none of these teams are exactly "on the cusp" so to speak.
For Indiana, Maryland and Rutgers, they not only have to be good, but they have to be good during a year where OSU, PSU and M are all putrid. Indiana came close to achieving the magic recipe by being good on a year where both PSU and M were putrid, but the OSU card didn't fall in line.
Now there could always be another 2012 where the third place team gets in, but those are difficult to predict.