GreyOcelot
Member
I wanted to believe Mantis was an ally so much when I first saw that trailer, but there's a screenshot of him on the horse with Man on Fire.
I think Mantis is an ally of Skull Face why? because the soldiers from the hospital are the same XOF soldiers from GZ and since we saw Big Boss later with SF teaming up maybe he becomes a buddy later?
Remember that Psycho Mantis was a part of Big Boss' army, as said at the beginning of MGS1. Something along the lines of FoxHound being comprised of former Outer Heaven soldiers. We can assume Mantis and, perhaps, some genome soldiers were being referred to? I need to watch that scene again.
this goes along with my theory that most of the bosses become allies and are recruited after you face them. quiet, mantis, code-talker, liquid, and possibly skullface (which would explain the end of the e3 2014 trailer)