The first trailer is out for the Halo Nightfall movie.
Halo 4: Spartan Ops - Episode 8 Trailer
A trailer is out for episode 8 of Halo 4: Spartan Ops.
Halo 4 Trailer VFX Breakdowns by Method Studios
Method Studios do VFX breakdowns of several scenes from their recent cinematic trailer for Halo 4.