20th Century Fox has released some early behind the scenes footage from the upcoming sequel War for the Planet of the Apes. The movie will continue the story from the end of 2014’s Dawn of the Planet of the Apes.

The video features director Matt Reeves (Let Me In) and Caesar himself, Andy Serkis (The Lord of the Rings: The Two Towers) revealing details about a new contest that will give one fan a chance to play an ape in the film by submitting their best ape impression to apescontest.com.

The behind the scenes footage features a fully equipped human army trekking through the forest as well as a pre-rendered ape running. While the humans were outnumbered by the ape army in the last film, it looks as though the civil war between Caesar and Koba (Toby Kebbell, Fantastic Four) had greater ramifications on the apes strength. Reeves revealed more information about the film’s plot last year.

As this story continues, we know that war is not avoided by the end of DAWN. That is going to take us into the world of what he is grappling with. Where he is going to be thrust into circumstances that he never, ever wanted to deal with, and was hoping he could avoid. And now he is right in the middle of it. The things that happen in that story test him in huge ways, in the ways in which his relationship with Koba haunts him deeply. It’s going to be an epic story. I think you’ve probably read that I sort of described it where in the first film was very much about his rise from humble beginnings to being a revolutionary. The second movie was about having to rise to the challenge of being a great leader in the most difficult of times. This is going to be the story that is going to cement his status as a seminal figure in ape history, and sort of leads to an almost biblical status. He is going to become like a mythic ape figure, like Moses.

War for the Planet of the Apes is currently shooting and set to open in 2017. You can watch the video below.