This possibility, along with Jericho, would be a first since CBS has always made sure their cancelled shows stay dead and buried. Heck, NBC could have a first-rate lineup airing all of CBS' shows that were cancelled after the first season... even though they were drawing 8-10 million viewers per episode.
"When asked what went wrong for Unforgettable to warrant the cancellation after a relatively solid first-season run, CBS entertainment president Nina Tassler said the question is not “what went wrong with Unforgettable but what went right with the new pilots.” Unforgettable averaged 12 million viewers and a 2.5 among adults 18-49."