When I checked itn.net, I discovered that CO removed my 11/21 flight, CO 1154 (6:00 P.M. ATL-EWR) from their schedule. The computer-selected reprotect was a new flight which left 30 minutes later. I declined it, opting to take the 4:45 P.M. flight instead.
Interestingly, though, was that the agent mentioned that both of these flights (the 4:45 and the 6:30) were HIGHLY under-capacity. IIRC, the 4:45 (operated with a 733) is just over 25% booked, while the 6:30 (a 735) is about 20% booked. She then speculated that CO might cancel BOTH of these flights, and combine them into a single departure.