My flights on 732 are always CVG - DCA; thus the air marshalls.
In the past, I have been bumped out of my seat many times by an air marshall. However, now that upgrading only occurs five days in advance, the air marshalls already have their seats assigned (my trip tomorrow was upgraded three weeks in advance and I foolishly selected 2B). Sounds like worse that could happen to you is flying in 1A, 1D, and 2A.
Again, depending on route, you might not have any Air Marshalls. I wouldn't worry about it but I would check dl.com periodically to see if you were bumped out of your seats to try to get things fixed as soon as possible.
Marc