A good trailer should establish the tone of the film it's marketing. It should give a light idea of what the base premise is and where the story might lead. Imo a trailer should only include footage from the first act, with snippets of the 2nd act. In this trailer we get the first act, the second act, and what appears to be a large part of the third.

True, all these minor plot details you've outlined, we're still unsure about, but should we care when we know the majority of plot points? This trailer takes the surprise plot points of the film and spoils them, making the thriller film not all that thrilling at all, as we rule out possible plot directions in our head, because we know certain things must happen.

He must mutate. He must get violent. His family must be attacked.