To me, the next step is to have Frontier move from C concourse to D concourse at MKE. This would make the codeshare more convenient. Is there room for Frontier, Midwest, Southwest and Great Lakes in D? Meaning if Midwest wants to expand again will they have the gates needed to expand? I can also see AirTran going after the gate vacated by Frontier if this were to happen. AirTran seems to be broom riding around MKE these days because Midwest won't go away. That's putting it politely.