Feige spoke with the Toronto Sun and dropped the news matter-of-factly while talking about future bad guys in the MCU. Vulture is one of Spider-Man's oldest foes, debuting in The Amazing Spider-Man #2 way back in 1963. Keaton will be a much younger version of Adrian Toomes than is usually depicted in the comics. Toomes built a flight harness that gives him enhanced strength and the ability to fly, obviously.
The Amazing Spider-Man opens July 7th 2017.