User blog comment:IceFireWarden0/Speculations for Season 11/@comment-173.25.193.130-20130728162037/@comment-5259531-20130728221739

The UNSC members said in the finale of Revelation "Gotta hand it to ya, killing one of these agents would be tough, but three?"

I'm pretty sure they would have checked if one of the biggest dangers to their organisation was really dead or not, they wouldn't have just taken the Reds and Blues word for it, they would have made sure. Especially considering that the Chairman only let the Meta and Wash out to hunt Epsilon, and by the way they talked about Wash when they believed him to be dead it seemed like the Chairman was going to just throw them back in jail anyway.

Everyone has already argued against the Meta's return, so there's no point in me bringing up things that have been said a thousand times over, but that was just something else I remembered. It is still possible for him to return eventually like you said, but right now it is incredibly unlikely.