Norman Osborn
The rumor is that the fall of SHIELD and HYDRA was good business for Norman Osborn. By hiring all of the scientists remaining without a job, he built an empire to rival Stark Industries. And, just like in the comics, Norman is not a good guy.
Instead, he just pretends to be one, and has his own plans concerning the post-Avengers world. For him, there cannot be too much power. And I wouldn't be too surprised if a connection between him and Zemo is established.
Thus Norman Osborn is the one who pushes Toomes into becoming the Vulture. He is also the one who watches from the shadows how Spider-Man deals with this villain. And, in the end, he is the one who reaps all the benefits.
As the rumor suggests, he won't have too big a part in Spider-Man: Homecoming. However, he may end up a big baddie after Thanos is defeated, with the rumors suggesting that a Dark Reign adaptation will follow the Infinity War.
