Former Transformers Creative Manager Rik Alvarez spoke to the attendees at TFcon 2018, to give details of an unused plot for the 4th Transformers Live Action Movie… and with it some tidbits from G. I. Joe: Retaliation.
According to Mr. Alvarez, TF4 story takes place following the events of DOTM where a group of Decepticons lived in exile under the guidance of Lockdown. The group, known as ‘The lords of deception‘, hunts and kills Ratchet (taking away his signature buzzsaw) as well as Robert Epps (played by Tyrese Gibson); allowing the latter to jump franchises to become Roadblock of G. I. Joe: Retaliation, until Dwayne “The Rock” Johnson was brought into the cast of the second movie.
There would also be a joke in the movie alluding to Tyrese’s involvement with the Transformers Franchise where another would ask from Roadblock “Hey, weren’t you involved with that crazy robot war?“.
Rik also stated that Retaliation also featured the concept of Flint as the head of G.I. Joe.
You can listen to the full description (from 4:55 to 5:55), below: