Secret Invasion has uncovered many secrets about the Marvel Cinematic Universe that, while groundbreaking for viewers, were already known to its main hero, Nick Fury. One of the largest examples of this was The Harvest, a collection of the DNA of all Avengers present at the Battle of Earth. This included heroes like the Hulk, Captain America and Thor, whose samples were collected by Fury's Skrull allies that included Gravik. However, Gravik has since become radicalized with a plan to have his Skrull army infiltrate world governments to take over the planet.
Source：https://www.cbr.com/secret-invasion-dangerous-aspect-capain-marvel-powers/
