Our fingers will definitely be crossed hoping that they include some of this amazing-sounding footage on the Avengers: Infinity War Blu-ray/DVD that will be released in last summer/early autumn.
Hopefully we’ll get to see some of this footage on the Blu-ray, because it’s doubtful that we’ll see it any time soon.
Marvel is likely being very protective of Thanos’ image right now while the film is still trekking its way to a billion dollars at the box office, and they probably won’t want to officially release anything that will make audiences think he’s too silly to see as a credible threat.