Those who continue to cast aspersions on Marshall's academics...how about some documentation? The school does a good job of serving it's region. It's a regional university, not a national research institution. They shouldn't be penalized for who they are.
Two thoughts:
(1) I think the conventional wisdom is that the Big East is probably like the B1G and looking more for research institutions than regional universities (although, at this point, maybe they're just looking for warm bodies with a little bit of a pedigree and 35,000+ seats in a stadium). Marshall could have a top 5 program and wouldn't get a sniff of the B1G for that reason. So if the Big East thinks along similar lines, Marshall has to make a pretty compelling case to get an invite.
(2) Former Ohio Provost/current Marshall President Stephen Kopp has been pushing Marshall towards becoming more of a research institution and has taken a lot of (I think undeserved) flack for it. If the Big East does want research institutions, this internal battle at Marshall may come into play.