Board Thread:General Discussion/@comment-27252392-20160203045920/@comment-26955524-20160705063201

Actually, the Meta's namesake ties into and references the Halo canon and universe. It's very briefly mentioned in the AI class in season 10 (I don't know which episode, because I watched the episodes as 1 movie):

AI's can suffer from a...for lack of a better phrase terminal "disease" called Rampancy. When Rampancy occurs, an AI develops delusions of granduer and a god comples along with feelings of contempt and hatred for their (what they view) inferior creators. There are 3 stages to AI Rampancy-- 1) Melancholia.  2) Anger. 3) Jealousy.  After the third stage, there's a theoretical fourth stage called "Metastability," where an AI can be considered fully "human." (I don't quite understand what that means myself).

In one of the few tie-ins to the Halo universe, it can be assumed that Sigma-- Agent Maine's AI Fragment-- was suffering from Rampancy and had possibly achieved Metastability...or he renamed himself (and Maine) the Meta in relation to his plan-- to absorb the other AIs in hopes of becoming the Alpha.