Joblo have posted an article from a "source" claiming to confirm who some of the Transformers will be appearing in the latest live action movie. This should very much be taken with a pinch of salt as the script it's supposedly from could easily be a fan produced piece of fiction. For those not wanting to be spoilt, look away now.
From Joblo:
That's right, folks, our source has confirmed that TRANSFORMERS 4 will feature none other than the famed Dinobots, including fan favorite Grimlock. No word on whether he'll retain his neanderthal voice, but one can only hope he does as that's a true staple of the character. One of the villains of the film will be a character named Lockdown, who has a ship full of decommissioned Transformers, including the dinobots, which are somehow brought back to life by a captured Optimus Prime. Prime is joined by returning autobot Bumblebee and at one point both characters (and potentially others) will "ride" the Dinobots into battle in Hong Kong (which fits well within the announcement that the film would film partially in China), with Prime on Grimlock and Bumblebee on a Pterandon, presumably Swoop.
Additionally, the autobot Hound will make his debut, as well as a former "Samurai" Decepticon that wants to regain his honor and become an Autobot (UPDATE: Source confirms this is Drift). And what about Megatron, who is presumed dead after the last film? Well, fans of TRANSFORMERS: THE MOVIE will be happy to know that not only will the dinobots be making their debut, but also Galvatron, who is basically Megatron "reborn" (and originally voiced by the first Spock, Leonard Nimoy).
So those characters who are listed are:
- Optimus Prime
- Grimlock
- Swoop (assumed)
- Lockdown
- Bumblebee
- Hound
- Drift
- Galvatron