There will be a worldclub in the new terminal that they are building at IND. 75 minutes at IND has got to be the most boring 75 minutes you can have in the NW system. If you are hungry most of the better food offerings (including a food court) is just outside of security by NW's gates. Security is usually pretty quick at IND, so you should have no problem heading out and getting a bite to eat.

I am not sure what the long term strategic plans are for IND, I do know that NW has downsized service to the markets I used to pay attention to (going from all DC-9's to CRJs into DCA, and only one DC-9 heading into LGA)