The "Avengers: Age of Ultron" Blu-Ray/DVD is set for release next month and it comes packed with a bevy of special features including one on the Infinity Stones.

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With three years left before the "Avengers: Infinity War" gathers every superhero in the Marvel Cinematic Universe, a primer on the Infinity Stones will come out as a special feature this October.

For those who cannot wait for the release, Facebook user Tony Stark Sincero shared a leaked copy of the special featurette that details what we know about the Infinity Stones which has debuted in the MCU thus far.

Four of the six Infinity Stones have been introduced into the MCU already, with the last two coming in the next two and a half years. The Mad Titan Thanos has been busy at work behind the scenes gathering each of the stones to satiate his thirst for ultimate power and kill billions of beings across the universe.

So far, none of the four are in his grasp, but things are about to heat up in the next few Phase Three movies as Thanos will be ramping up his efforts to grab all six stones and wield them in the Infinity Gauntlet.

Watch as the cast and crew from the various Marvel movies give us a primer on each of the four stones that have appeared in the MCU.

The epic follow-up to the biggest Super Hero 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.

Marvel's "Avengers: Age of Ultron" is coming to 3D Digital and Digital HD on September 8. The Blu-ray, 3D Blu-ray, DVD, Digital SD and VOD will soon follow with an October 2 release date.

TagsInfinity stones featurette, Age of ultron Blu-ray, leaked infinity stones featurette