One of the actors in the film, Titus Welliver, was talking to The Nerdist about it, saying,

“I’ve now won the hard earned respect of my children because I’m in a Transformers film, and I’ve always wanted to work with Michael Bay and certainly Mark Wahlberg and Kelsey Grammer.” 

When asked about what fans could look forward to in the movie, this is what he had to say,

“It’s a bit more of a darker vision of the Transformers world… It’s not a kids movie, I’ll tell you that much.”

All of the Transformers movies have been PG-13, and none of them have necessarily been “kids movies,” but it doesn’t stop parents from taking their kids to see them. So how much dark can it be will it be dark as Saw movies or the Pan’s Labyrinth.

Well i hope the fourth will be a kick ass dark movie for us to enjoy, Kids can watch Barney or some other show at Disney!

Via: TFW2005