I heard on NFL Sirius that the Denver, Kansas City game was flexed to the 3:30 slot for this week. They said the giants game would stay where it was at though. Not sure what it means or if it was true.
Just to clarify this a bit, the DEN-KC was moved to a later afternoon start, but it was not "flexed" per se. It was simply rescheduled, just as NE-HOU was moved from 3pm Central to noon Central. Flexing specifically refers to SNF.
As mentioned above, DEN-KC in week 13 is protected and may not be moved off of CBS.