We haven’t yet mapped out the time travel itinerary.
INDEXER NOTES (SPOILERS!)
Credits—We credit producer Tom DeSanto as an uncredited storywriter based on the <a href='https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FTransformers_%28film%29'>Wikipedia note</a> stating that he wrote the initial treatment. We also credit Hasbro, Jim Shooter, Denny O’Neil, and Bob Budiansky as creators based on the <a href='https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FTransformers'>Wikipedia Transformers article</a>. Only Hasbro appears in the actual credits.