Both Halo Reach and Halo 4 were in development at the same time as well. As I said before, I think Halo 5 would have started development sometime in 2010 or 2011.
Well Reach was obviously Bungie, but I get your point.
My guess....Chiefneeds a new AI to Replace/Save Cortana and Mendicant Bias fits the bill
Funny,
that's exactly what that Halo: New Beginnings 'leak' said too.
Why would it? The MC could just eject him...