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Before Age of Extinction, original 4th TF film plot was this:
>Lennox and Epps as main human leads
>Megatron gets resurrected
>Autobots find time travel device
>Travel in time
>Other half of the movie is them in prehistoric earth time, they find the dinobots as the guardians of the Allspark and the Allspark in its glory
>Optimus transforms into a gorilla
>Megatron transforms into a T-Rex
>Some of that concept art got carried over to The Last Knight
