User blog comment:IceFireWarden0/Speculations for Season 11/@comment-198.45.201.206-20130526211513/@comment-4616231-20130527192223

I just said "dead" because it's easier for people. Technically dead isn't the right word, yeah. But nevertheless, Sigma was wiped out in the EMP along with the rest of the AI. So he's not coming back. Ever.