Winter was an evolved albino western lowland gorilla; who served as a member of the Gorilla Guard and the protégé of Luca. But he turned on his fellow apes for his own survival and joined Colonel McCullough as a Donkey, a group of turncoat apes who served Alpha-Omega; which led to the ape's undoing.
Vote which fictional character would naturally fit in-universe with a big-named franchise! No time-travel, no interdimensional crap, no "Pooh's Adventures", they would just exist in-universe.
