Last week, we showed you two previews for Avengers: Age of Ultron's release on 3D Digital and Digital HD September 8 and on Blu-ray, DVD, Digital SD and VOD October 2. While those previews showcased new characters Vision (Paul Bettany) and Ultron (James Spader), today we have yet another featurette, which features the superhero siblings Scarlet Witch (Elizabeth Olsen) and Quicksilver (Aaron Taylor-Johnson). Both of the stars reveal how they worked with director Joss Whedon to develop their incredible super powers.

We also get plenty of behind-the-scenes footage with Joss Whedon, executive producer Victoria Alonso, and visual effects supervisor Christopher Townsend showcasing how they came up with Scarlet Witch and Quicksilver's powers, while Elizabeth Olsen reveals she even worked with a dancer, to get the right movements down to portray Scarlet Witch. We also get to see early concept art for each character, showing the evolution of their powers from pre-production through the actual shoot.

Marvel Studios presents Avengers: Age of Ultron, the epic follow-up to the biggest superhero movie of all time. When Tony Stark tries to jumpstart a dormant peacekeeping program, things go awry and Earth's Mightiest Heroes, including Iron Man, Captain America, Thor, The Incredible Hulk, Black Widow and Hawkeye, are put to the ultimate test as the fate of the planet hangs in the balance. As the villainous Ultron emerges, it is up to the Avengers to stop him from enacting his terrible plans, and soon uneasy alliances and unexpected action pave the way for an epic and unique global adventure.

Related: Marvel Troll Cuts All Women Out of Endgame Only to Prove How Crucial They Are

Marvel's Avengers: Age of Ultron stars Robert Downey Jr., who returns as Iron Man, along with Chris Evans as Captain America, Chris Hemsworth as Thor and Mark Ruffalo as The Hulk. Together with Scarlett Johansson as Black Widow and Jeremy Renner as Hawkeye, and with the additional support of Samuel L. Jackson as Nick Fury and Cobie Smulders as Agent Maria Hill, the team must reassemble to defeat James Spader as Ultron, a terrifying technological villain hell-bent on human extinction. Along the way, they confront two mysterious and powerful newcomers, Wanda Maximoff, played by Elizabeth Olsen, and Pietro Maximoff, played byAaron Taylor-Johnson, and meet an old friend in a new form when Paul Bettany becomes Vision.

Other bonus features included on the Blu-ray are From The Inside Out - Making Of The Avengers: Age of Ultron, The Infinite Six, which will set up Avengers: Infinity War Part 1, Global Adventure, Deleted & Extended Scenes with Audio Commentary By Joss Whedon, a Gag Reel and Audio Commentary With Director Joss Whedon. Marvel is also releasing the 13-disc Marvel Cinematic Universe: Phase Two Collection this December, which will include Iron Man 3, Thor: The Dark World, Captain America: The Winter Soldier, Guardians of the Galaxy, Avengers: Age of Ultron and Ant-Man, along with a "top-secret bonus disc." Check out these new previews for Avengers: Age of Ultron, before picking this up on Digital HD, Blu-ray or DVD.