I'm not gonna rule out the possibility of Neo bein' Muu or his clone but in both the opening sequences it featured that brief sequence with Rey, Neo, and Gilbert (in the background) which really hinted to me that the chairman definitely has a hidden agenda or a skeleton in his closet involving Rey and Neo and why Rey is able to hold his ground when they're in battle w/ each other.

And the second opening with Neo and Murrue is also a storyline i'm gonna absolutely watch develop or conclude (if it is in fact Muu) =^)

Honestly, for DESTINY i'd have to say that i'm more interested in this plot than what's goin' on with the main characters (Shinn, Athrun, Kira etc.)...anyone agree?