Sparth, the awesome concept artist at 343 tweeted the following link of A.J. Trajan’s Halo 4 concept art. Some amazing stuff there.
Here are the concept art pieces you can find there (click to make bigger and see more of the pics):
This is some fantastic work.
I’d love to see a complete concept art of Halo 4 book out there to buy. So many great pieces by various artists.
-Sal