B10 does not want a non-AAU school like syracuse.
Does PSU want Pitt?
Pitt is an AAU school in B10 area.
I agree that non-AAU schools definitely have an uphill climb to get accepted by the B1G. However, Notre Dame has been invited on many occasions which means its not impossible. As far as non-AAU schools that may have a shot at the B1G, I would put Notre Dame at the top of the list following by Syracuse and Boston College. Syracuse was AAU, a basketball powerhouse, and offer more NYC viewers as well as upstate New York market. Boston College obviously has a desired market with a new footprint state in Massachusetts, has a decent history in athletics, is strong in academics despite not being AAU (#31 National by US News). I could definitely see the B1G adding Syracuse and Boston College as #15/#16 if Notre Dame was still off the table. If that were all to happen, Connecticut could kiss the B1G goodbye.
For Pitt, if the ACC collapsed I could definitely see West Virginia lobbying strong for Pitt and Louisville into the XII. That would get the XII up to 12. The B1G may grab North Carolina and Virginia to get to 18. Then I could see the SEC taking North Carolina St and Virginia Tech to get to 16. The SEC may decide to take Florida St and either Georgia Tech or Clemson to get to 18. The XII would take Miami and the other of Georgia Tech or Clemson to get to 14. Wake Forest and Duke may find their way into the XII as well for 16. Cincinnati and Connecticut may sneak in as well to get the XII to 18.
All of this assumes the PAC decides to stay put which is unlikely so they make grabs for the KanTexHoma-6 to get to 18 which drops the XII to 12 so they grab Central Florida, Houston, BYU, Memphis, and Tulane for markets. Notre Dame being forced to join a conference goes to the XII.PAC
Central - Kansas, Kansas St, Oklahoma, Oklahoma St, Texas, Texas Tech
Southwest - Colorado, Utah, Arizona, Arizona St, UCLA, USC
Northwest - Washington, Washington St, Oregon, Oregon St, Stanford, CaliforniaB1G
West - Nebraska, Iowa, Minnesota, Wisconsin, Illinois, Northwestern
Central - Indiana, Purdue, Michigan, Michigan St, Ohio St, Penn St
East - Maryland, Rutgers, Virginia, North Carolina, Syracuse, Boston CollegeSEC
West - Texas A&M, Arkansas, Missouri, LSU, Mississippi, Mississippi St
Central - Alabama, Auburn, Kentucky, Tennessee, Vanderbilt, Florida St
East - Florida, Georgia, Georgia Tech, South Carolina, North Carolina St, Virginia TechXII (or probably some new name)
West - BYU, Baylor, TCU, Houston, Iowa St, Tulane
North - Cincinnati, Louisville, Pittsburgh, West Virginia, Connecticut, Notre Dame
East - Memphis, Clemson, Miami FL, Central Florida, Duke, Wake Forest