I was just thinking that maybe it could happen since MGS and AC have a history of cameos in their games.

PEACE WALKER leap of faith http://www.youtube.com/watch?v=N-QN-...ure=plpp_video

MGS4 altair costume http://www.youtube.com/watch?v=wJKyS...ure=plpp_video

MGS's RAIDEN costume in Brotherhood http://www.youtube.com/watch?v=qpid_...ure=plpp_video

MGS's CARDBOARD Box in Brotherhood http://www.youtube.com/watch?v=8wp2H...ure=plpp_video