The first trailer is out for the Halo Nightfall movie.
Halo 2 Anniversary - Cinematic Launch Trailer
Here is the cinematic launch trailer for Halo 2 Anniversary, featuring CG by Blur Studio.
Halo: Nightfall - Official Trailer
The official trailer is out for the Halo: Nightfall series.
Halo 4: Forward Unto Dawn - Part 4
The action ramps up in episode 4 of Halo 4: Forward Unto Dawn.