I'm one of those people that loves to search for game and film wallpapers on Google, especially game, and as I was just doing so for Halo 4, I saw this image.
That's Master Chief struggling with an Elite. I'm not sure if they've already said who you'll be fighting or not since I haven't really be paying all my attention to strictly Halo, but I think this was an interesting thing to see, and maybe reveal? I love the Halo campaign's, it took me a little while, maybe late 2006 mid 2007 to get into it all completely, but I did and from there to now, I think it's one of the greatest sci-fi's out there.
Halo from CE to the beginning of two was always just kind of one of those games I felt everyone conformed to liking because it was "epic" and had good multiplayer, but I did play it quite a bit even though I wasn't that into it at the time. I'm excited for Halo 4, and I really just want to see what new setting they have. Anyways, do you think the Elite will be an enemy once again? If so, as of right now since it's unexplained, it's quite ironic. You can only guess.