This 8 episode anthology of 10-15 minute length each, explores the origin and historical events of the HALO universe, and various characters inhabiting the world.

Like Animatrix and Batman Gotham Knight, each of the 8 episodes will be created by a separate prominent Japanese anime producer.
 
http://www.imdb.com/title/tt1480660/

Episodes:
1 - Origins I
2 - Origins II
3 - The Duel
4 - Homecoming
5 - Odd One Out
6 - Prototype
7 - The Babysitter
8 - The Package

Extras:
Halo Legends Theme song
DVD trailer by Warner Bros
Special report by MSNBC