i was looking at the terminal 5 and at the halo fest:halo 4 concept art and i notice something, the ships look the same!
here are the links:
http://www.youtube.com/watch?v=vAKmu2yn3Fk&feature=plcp for halo concept art
http://www.youtube.com/watch?v=QUaFP-AiOB4 for terminal 5