Lol, Sssnake.
Seriously. They do need to keep liquid. And in more than just an arm, too. Have liquid's controlling ocelot be all but total, and he'd get.... like, plastic surgery or something.
(Btw.. I think it would kick ass to have a couple of versions of the story. IE, if Meryl's in it, you'd need to beat the game as Snake.. then you could play it from Meryl's point of view, maybe even have Otacon as a playable...! .... *laughs* ..or maybe not. )