Wisconsin head coach Mike Eaves spoke to the UW athletic board on Friday, and according to this article by Jeff Potrykus of the Journal-Sentinel, the topic of future Big Ten expansion was a popular one.
Eaves cited an increase in student excitement and attendance--a claim, judging by reported attendance, that is iffy at best--due to playing more nationally recognizable schools as a reason for the success of the Big Ten.
Eaves said he could see, or at least hoped he would see, the Big Ten expand with the next 5 to 10. He listed Indiana and Illinois as possibilities due to their strong club programs--though both would require the school to build a brand new facility to play hockey. He also mentioned Northwestern as a potential target, where Badger alum Chris Chelios is helping a commission determine the feasibility of the Wildcats starting a program.