First, keep The Rock as the main character (or have another star like him, maybe John Cena, play as the mc). Make the film self-aware of its absurdity and lean right into it!
Make the first about three people, two men and a woman, who get paid to participate in a trial run of an experimental drug (it is later revealed there were more people, of course) and the drug transforms them into giant violent animals. Our main character turns into an orange gorilla (no, not an orangutan), a giant lizard with snake and crocodile features, and a bipedal wolf. The three transform at different intervals during the movie, destroying different parts of the county they reside, until the three encounter each other in the city where they were given the drug and fight it out in their giant animal forms. George wins the fight, killing the other two, and our main character turns back into his human form and runs before he can be seen by any military or camera.
The second film reveals there were thirty-nine other people who took the drug and they all had the same results, becoming giant monsters and destroying cities; many of them being killed, but our mc finds three people who have yet to be killed. These new three turn into the monsters Boris, Curtis, and Ruby. He helps the one who becomes Curtis learn how to control their monster form, something he learns between movies, but we see him do it in the opening of this film. The other two lose control of their forms and our two heroes have to stop the out of control monsters, ultimately killing them and running away from the destroyed city; but they were caught on tape by the mad scientist who made the experimental drug, Dr. Eustace DeMonic (name actually from the games).
In the third and final installment we get a fight between five monsters, George, Curtis, and Crock going against DeMonic's "perfect monster form" V.E.R.N and his subordinate's monster form Nick. Our main hero throughout these films is the only survivor of the great battle and willingly becomes a weapon for the American military, so long as no one attempts to recreate the drug that made him a monster.
