There are some confusing rights at play here. Not long ago, Sony had the exclusive right to Spider-Man despite the character being a Marvel creation. The Andrew Garfield and Tobey Maguire fronted flicks all were Sony productions. However, Sony leased the rights back to Marvel for Peter Parker’s appearances in Captain America: Civil War and the upcoming Spider-Man: Homecoming.
Still, Sony still has some control over the character and surrounding world. The studio is currently developing a project called Venom, based on the villain of the same name. Now, however, they are adding another movie to their roster. Apparently, they are also developing a film based on the characters Silver Sable and Black Cat.