Board Thread:Speculation House/@comment-16277621-20130823040543/@comment-15108745-20130823052915

Yeah, Monty has compared the trailers to be like the TF2 shorts that Valve used to explain the characters. He's been kind of hinting at the fact that they're more just showcases displaying the personalities and abilities of the characters.

But he hasn't straight out said that the trailers are not canon.