Metal Gear Solid VI: Phantom Sons of the naked Ocelots Confirmed!
Featuring all new protagonist Cobalt Snake (voiced by David Hayter) who is totally not a clone of a clone, at least not until the surprise twist ending where he totally is, as he takes on the terrorist cell Phantom, headed by the not clone of Ocelot, except until the first twist in the middle of the game at least until the middle of the game where it turns out it was a brainwashed by nano machines Otacon working for the president [of Fox news], as they use the newest metal gear: Metal Gear Ocelot, controlled by the brain of Naked Snake himself.
coming soon.
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On topic, I believe he wants it to be his last nobody wants to keep working on the same project forever, but I doubt Konami let him stop they will probably clone him just so they can keep churning more Metal Gears, and they'll always be his last.