‘Transformer’ Producer Drops Major Unicron Tease

But will Orson Welles reprise the role?

At the world premiere for “Transformers: Age of Extinction” in Hong Kong, series producer Lorenzo Di Bonaventure opened up about the latest installment starring Mark Wahlberg, as well as what’s coming next.

The conversation with MTV News covered a lot of ground, including an interesting tidbit about a fan-favorite villain. Here’s what we got.

Video contains minor spoilers

Dinobots
Grimlock makes his big screen debut in “Age of Extinction,” and his appearance will mark the end of a very long fan campaign to include him and the rest of the Dinobots. Di Bonaventura knew of the fan demands, but wanted to wait for just the right moment.

“I think the first thing was finding a good creative reason and not just sticking them into a movie. We heard the fans all along, and we kept thinking ‘God, how are we going to get the Dinobots in here.’ It felt to us very inorganic,” he said. “It’s a very big decision to have a dinosaur enter something that feels present day, if you would, or near future, depending on how you look at it. We had to find an idea that really made sense. ”

Cameos from Shia LaBeouf, Josh Duhmel and Tyrese Gibson
Despite rumors, there were never plans to bring cast members from the first three movies into “Age of Extinction.”

“Those guys did a great for us, and we love every moment. But part of what we were trying to do is do something brand new,” Di Bonaventura said. “I wouldn’t rule it out in the future. You never know, but for us, it was about making a new experience for the audience primarily, but also for us.”

Bay Back for “Transformers 5″?
Paramount just announced a 2016 release date for the fifth entry in the series, but Di Bonaventura doesn’t know if series director Micahael Bay will return. “I hope so. I assume so,” he said. “If he doesn’t, I’ll be very disappointed. I’d be surprised.”

Unicron
The baddie formerly played by none other than Orson Welles has also been at the top of fan request lists, but Di Bonaventura sees a problem with the legendary Transformer’s size. “The problem with Unicron is how big it is,” he said. “It’s boring, that big. How do you stop it? We’ll get there, but when is a good question.”

G.I. Joe – Transformers Crossover Movie?
Nope, sorry. “No, we haven’t spent a moment,” Di Bonaventura said. “It’s hard enough to figure how to do it alone.”

“Transformers: Age of Extinction” opens in theaters on June 24.

Writer/editor for MTV. If it involves cowboys, spies, or hitmen, I'm there. All three would be ideal.