+ Angry Guard Dog: Underbite resembles some manner of hyper-stylized mecha-bulldog.

+ The Big Bad Wolf: Steeljaw, who has a lupine-like appearance.

+ Frogs and Toads: Springload, a Decepticon with frog-like features.

+ Giant Enemy Crab: Bisk, a Decepticon with a distinctly crustacean look, including eye stalks and snapping claws. Clampdown, on the other hand, is più of a literal example, lacking Bisk's humanoid shape and looking like a straight-up robot crab.

+ Giant Flyer: Filch, a giant mechanical bird Decepticon that is strong enough to lift an RV and two Autobots.

+ Giant Spider: Chop Shop,...

Theory #1: Nemesis Prime

It's been years after Optimus Prime left Earth to find his creators. Ever since, Rodimus Prime, Optimus Prime's son, is leading the Autobots.

However, Optimus Prime quickly finds the Creators. They kidnap Optimus Prime and create a clone of Optimus Prime to destroy Earth.

Meanwhile, back on Earth, Rodimus Prime and the Autobots battle Galvatron and a new group of Decepticons when Nemesis Prime, under the guise of Optimus Prime, joins the battle and saves Rodimus Prime.

Rodimus Prime and the other Autobots rejoice that "Optimus Prime" has returned. However, the humans start...