Today marks the release of the long-delayed “Marvel Cinematic Universe: Phase One- Avengers Assembled” 10-disc box set. Included in the set is a preview of Marvel’s Phase Two, a clip of which Marvel released today (see below). The clip focuses on “Iron Man 3,” but all Phase Two films are addressed in the full-length feature, including the first footage from “Thor: The Dark World.” Check out the video and, if you are so inclined, order the box set below.