After Tony Stark's death, as Peter Parker felt the weight of possibly carrying on Iron Man's legacy, a cabal of disgraced and discouraged former Stark Industries employees, headed by illusioneer Quentin Beck, decided to manufacture a new "hero" from scratch. He would fill the void left by Tony's passing, trick the world into believing they were under attack by multiverse monsters, and generally run circles around everyone using deep fake footage to control the narrative. As Mysterio, Beck never wanted to protect the world, only make people think they were safe while he killed thousands in his quest to inherit Tony's legacy - and weapons.
10/10