Like it says on the tin. Kong AND Godzilla both arrive in Hong Kong only to find that waiting for them are the former God of War, his manbeard, a severed head, and his son a.k.a. Boy.
And the only thing he has to say? "Go back. You do not want this fight."
Of course, neither of them intend to bow before any other. Even if that other once threw down Olympus itself and beat the entire Greek pantheon to death while doing it(and has only gotten started on the Norse pantheon...)
Kong + Godzilla VS Kratos. Kratos gets all his gear from the end of GOW4.
Can the twin peaks of Titankind take down the former God of War, and current reigning Father of the Decade?