Oh and fyi, the show's creator, who also created Pushing Daisies, already has the entire series mapped out in fitting into the lead up right around where Red Dragon picks up. Thought it out going into the 1st season, and said it would be a 5 season, 6 at most storyline.
I'll be pissed if they don't get renewed for the entire 5 or 6 season run. Thankfully, Sony, who actually owns and produces the show, is very high on it, and feels even without NBC, they'd have a new home very quickly if the peacock didn't renew it. It also does get good ratings outside of the US, and it's Friday night timeslot is a ratings deadzone for any show so it's hardly just Hannibal to blame.