As part of an interview with talented voice-actor John DiMaggio, voice of Futurama's Bender and Marcus Fenix in Gears of War, DiMaggio sheds some light on what to expect in Gears 2, including a fresh confrontation with a Brumak, new weapons and more. He was clearly excited to be a part of the sequel and was genuinely impressed by what he saw.
In terms of production schedule, it appears DiMaggio has been working on his contribution for a while. Interestingly, in addition to once again voicing Fenix, he also reprises the role of Franklin – leader of the Stranded, who plays a role in the Nighfall chapter as he guides the player through the checkpoints towards the gas station.
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Source: IGN