This interview is from Screen rant who he said this to:
Live-action we are going to deliver a G.I. Joe crossover. I hesitate using the word crossover because I think people think different things about what that means. For me, what it means is the Joes are going to be in the Transformers world and be present. I think every movie is sort of a balancing act of "How much do you have this? And in this movie, how funny can we be? How serious? How do you cross that line? How do you hide the villain?" All those sort of balancing things that you're doing. We're still in the early process, in a way, of trying to figure out the balance.
Sounds like they only have the concept of a plan as of now. While this is more of a nothing burger story, what we can gather from this is that the film is nowhere close to being filmed as they don't even have any major plot details hashed out for it yet. So anyone looking forward to this film should be very very patient.
