User blog comment:IceFireWarden0/Speculations for Season 11/@comment-198.45.201.206-20130526211513/@comment-5210307-20130527144931

I agree with Western Gen. The UNSC appears to have 'pardoned' the Reds and Blues, and they haven't been that much of a threat in light of Project Freelancer's downfall. As for the Insurrectionists, given that the demoman is still alive, if deleted scenes are to be believed and with the female and sleeveless soldier presumed dead (unless they managed to survive), it's possible they could make a reapperance, given that Carolina mentioned 'low-level thugs' in the end of Season 10.

But yes, we need a new villain, someone threatening enough to drive a whole new plot forward