Skip to 3:30 for the God of War talk.
TLDW: Sony wanted someone who could do both the voice and the motion capture, instead of 2 different actors.
TC seems to imply Sony was shady with how that went down.
"It was how it was done. As an actor, you lose jobs all the time - you are done with jobs all the time. But when somebody lets you go, it's a respect thing for me - just come and talk to me and say "Hey, you know, thank you for your service, but we're going in a different direction." Never got any call like that.