If you're a plane spotter, Sunday will be the best viewing day to see all the different VIP aircraft parked at ORD. My list has about 60 so far and none will be parked at T5 as to interfere with scheduled operations.
Logistically everyone is praying for clear skies as to get them in, offloaded and the a/c moved in a timely manner.
Monday is the finally briefing before the ClusterF... begins on Friday with our first arrival in the late afternoon.