Here to share a Halo trailer mashup I created myself (I'm still UncookedMoa). Just like many other people, Elysium looked familiar. It reminded me of Halo, ringworld and all. So I decided to create a mashup between the two using Elysium's second trailer and various Halo footage throughout the Halo series.
http://www.youtube.com/watch?v=lDUOqElVNVk