Tons of new details revealed at TGS 2014.
I've updated the title to remove the spoiler element. I'm also about to mark comments talking about it as spam to prevent others from being spoiled by the comments. Only click through if you want to have something slightly spoiled for you that involves Snake saying he's going to kill someone specific. People posting the spoiler info below after this may receive a restriction for posting spoiler information. ~cgoodno