We already know that director Michael Bay is revamping the franchise with Transformers 4, bringing in a whole new cast including Mark Wahlberg, Nicola Peltz, Jack Reynor, Stanley Tucci, Kelsey Grammer, Sophia Myles, and Bingbing Li. An unconfirmed rumor has surfaced that reveals potential spoilers below, so read on at your own risk.

According to unidentified sources, the director plans on bringing back the Dinobots from the 1980s Transformers animated series, including Grimlock. The report also indicates that one of the main villains will be a character named Lockdown, who possesses a ship full of decommissioned Transformers, including the Dinobots, who are reactivated by Optimus Prime. Both Optimus Prime and Bumblebee will reportedly ride the Dinobots Grimlock and a Pterandon (possibly Swoop) into battle in Hong Kong, which falls in line with the news from last month that the sequel will be partially shot in China.

The Autobot Hound is also set to make its big screen debut, along with Galvatron, a "reborn" version of the villain Megatron. There is also a new Transformer who is a "samurai" warrior that used to be a Decepticon, but wants to switch sides to the Autobots. We reported in April that shooting will begin next month in Michigan and Chicago, with the production shifting to China in October.

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The information reportedly came from a recent marketing event, but has not been confirmed (or denied) by Paramount yet. We'll have to wait and see if any official confirmations or denials come through from either Michael Bay or Paramount Pictures regarding these details.

We should also point out that a similar /transformers-dark-of-the-moon-to-feature-the-dinobots/story broke back in April 8, 2011, in regards to Transformers: Dark of the Moon and its inclusion of the Dinobots, based on some pre-released Dinobot toys featuring the Dark of the Moon logo on their packaging. The Dinos didn't make it into the final film, but maybe this time they will. And to keep a joke running throughout this series of films, we just got off the phone with our old pal Danny DeVito, who once again confirms that Mike Patton will be voicing Grimlock. For real this time...Uh-huh. The singer and voice-over artist was also rumored to be playing a dump truck in Transformers: Revenge of the Fallen and Triceradon in Transformers: Dark of the Moon. Will we finally get the Transformers' Mike Patton performance fans have been wanting for years now? Doubtful, but there's always hope! Come on, Michael Bay! Make it happen. Put Mike Patton in your movie!