The Chicago Tribune has some anonymous sources from inside the Big Ten saying that there are at least "five different schools would add enough revenue to justify expanding the league beyond 11 teams." The Chicago-based investment firm William Blair & Company apparently gives the thumbs up for each of "the obvious suspects" (Missouri, Notre Dame, Pittsburgh, Syracuse, and Rutgers), but cautioned that other universities could earn consideration. It doesn't say if this is for a 12 or 14-member expansion or if they are considering institutions' academics/research grants.