http://www.dylancolestudio.com/

Concept art done

Err these are Halo Wars CGI renders?

Looks like it's from a cutscene that never made it into the game set in the Arcadia city level.

You can see copyright 2008 in the bottem left corner.

Edit: After reading the website it is concept art of a Forerunner city for a cancelled Halo project. Pehaps this could of been a concept for Halo chronicles? Thought I don't know why Ensemble would have it while Halo Wars was long in development at this time.

Yep, that is a possibility.

EDIT:  But that is forerunner architecture and what appears to be humans walking around it.  Not sure that fits in well with the Halo Wars storyline.

another halo game in the works maybe?

Maybe, but not from Ensemble.  For obvious reasons.

Forerunners are humans. But an ancient race of humans that destroyed themselves when activating the Halo rings the first time to stop the flood 100,000's of years ago. (The Rings kill all sentient life in the galaxy) Potential food for the Flood to consume and grow.

I'm guessing life on Earth began a new and we evolved into what we are today. The only problem is we don't evolve from simple organisms into what we are now that fast. Pehaps some forerunners survived (I'm sure they had the technology to leave the galaxy or there are other shield worlds like Onyx) and they sped up the evolution.

This is why Master Chief and all other humans can activate Forerunner technology and the Covenant can't. Humans have Forerunner genetic code inside of them.

The picture above must be set 100,000's of year in the past.

Most of this is speculation as the Forerunners are a mysterious extinct race. Shame nobody has fleshed them out yet but I doubt they ever will. Looks like Ensemble might have but this game is cancelled according to the guy who created this image.

I thought Bungie insisted that Forerunners were not a race of humans.  Humans were just a race that the Forerunners thought very highly of.

Wow, that is just beautiful. All they need now is a graphical engine with some juice behind it because they obviously have the artwork down. :)

I think that more than likely it is the canceled MMO that Ensemble was working on

Ensemble doesn't even exist anymore.