Here's a clip from The Amazing Spider-Man 2, and a featurette about scoring the film.
The Amazing Spider-Man 2 - Featurettes
Here are two featurette videos for the upcoming The Amazing Spider-Man 2 fim.
Guardians of the Galaxy - First Trailer
Marvel have released the first full trailer for Guardians of the Galaxy.
The Avengers: Age of Ultron - Teaser
Marvel have released the Comic-Con teaser for The Avengers: Age of Ultron.