Among them are Walter Koenig (Chekov), Tim Russ (Tuvok), Gary Graham (Enterprise), Richard Herd, Garrett Wang and Initiraymi (all from Voyager). More about the show will be revealed soon.
The official announcement includes the following: "Renegades will be a departure from previous Treks – delving into the dark side of the human psyche, pushing our heroes to their limits, forcing them to carry out actions that they never would have as Starfleet officers. The rules have changed, and they realize they might be the last hope to save the Federation. Star Trek: Renegades will be action oriented, filled with suspense and espionage; all while exploring new worlds, encountering both familiar and new alien species, and boldly going where no Trek has gone before.