Check out Polynoid's beautiful VFX work for Halo 4: Forward Unto Dawn's opening.
Halo: The Master Chief Collection - CG Trailer
Master Chief nukes some Covenant in this CG trailer for Halo: The Master Chief Collection.
Szymon Biernacki's Concept Art for Halo 4: Spartan Ops
Here's some of the concept art work created by Szymon Biernacki for Halo 4: Spartan Ops.
Halo 4 Spartan Ops - Episode 2
Here is the second CG episode created for Halo 4's Spartan Ops.