I saw a JAL 747 takeoff on rwy 5R at 12:10am. E.S.T Friday morning. I'm guessing the flight was diverted to IND from ORD since ORD was having some bad weather. Not something you see every night at IND.
Possibly, NRT or OSA to ORD last night (Thursday) it was thunderstorm in Chicago between 9:45 to 11:00pm. Possibly near ran out of fuel need to land in IND and refuel back to ORD until weather is cleared.