In a blunt interview with Game Informer's podcast, David Hayter, the longtime voice of Solid Snake until 2014's Metal Gear Solid 5: Ground Zeroes and last year's Phantom Pain, indicated that Konami and Kojima Productions had tried to get rid of him before.
Hayter told Game Informer he had to re-audition for his role in 2004's Metal Gear Solid 3: Snake Eater. Hayter told Game Informer that series creator Hideo Kojima was trying to get Kurt Russell to voice the role, but Russell declined.
"I've got no particular love for Kojima," he told Game Informer. Asked if he had played Metal Gear Solid 5, Hayter said no. "That'll be 60 hours of humiliation that I can't get to," he told Game Informer, adding that he hasn't played Ground Zeroes either.
While I understand the disappointment, his handling of this whole thing has been really discouraging to see as a longtime fan. Hayter is a successful screenwriter and had voiced numerous video game characters including the various Snakes since 1998, he has had and will continue to have an great career, with or without Metal Gear and Konami.
He's done so much good for Metal Gear over the years and it's obvious that he really cares cared about the franchise. His departure from the series really could have been an opportunity for him to simply ride off into the sunset but it's now clear that won't happen.