Of all the non-hockey BigTen schools, I would still think college hockey would make the most sense at Iowa, Nebraska, or even Rutgers, but more power to Illinois if they go through with it. That said, I'm skeptical until they find a big donor like Penn State and Arizona State had.
Oakland and UNLV are looking into D1 hockey, too. Oakland would be an easy addition to the WCHA, as would any Midwestern school (I still think public non-FB schools with minimal basketball success within the Midwest and Northeast like Green Bay, Cleveland State, and Binghamton are obvious potential hockey schools, but what do I know?), while UNLV along with Arizona State would have to align with the Alaska schools, Air Force, and another future program in the West to create a new league, assuming Denver and Colorado College wouldn't leave the NCHC. That said, UAH could join that group and improve its hopes for relevance without increasing its travel costs that much. Time will tell.
Anyway, Michigan should have a 2/3 seed. It's absurd that none of the regionals are actually in the Midwest, though....