Reclaimer Saga

The Reclaimer Trilogy is the recently announced second trilogy of Halo games. The series begin with Halo 4, set to be released in the 2012 Holiday season and will continue with Halo 5 and Halo 6.

Halo 4
"Set in the aftermath of Halo 3, Master Chief returns to confront his own destiny and face an ancient evil that threatens the fate of the entire universe. Halo 4 marks the start of a new trilogy that begins with its release in 2012."

- Official summary

Halo 4 marks the return of John-117 as the protagonist after three Halo games focusing on different sets of characters. Having been lost in space in the finale of Halo 3, John-117 and Cortana, adrift aboard the wreckage of the frigate, find themselves near a mysterious planet first seen in the Legendary ending of Halo 3.