If you check some of 343i’s current stuff in the website’s homepage (as of 11/11/13), you’ll see that they have some pre-dev footage up. Some of it involves Rainbow Warthogs.
… If they add in a skin or something that allows Warthogs to stream rainbows, they will bring in everyone that has ever existed ever.
(OK, not really, but I felt like making a stupid topic like this. … Seriously, though, those Warthogs looked awesome.)