Silver & Black

Silver & Black is an unproduced American superhero film based on the Marvel Comics characters Silver Sable and Black Cat that was to be made by Columbia Pictures in association with Marvel and distributed by Sony Pictures Releasing. It was intended to be part of Sony's Marvel Universe, adjunct to the Marvel Cinematic Universe.

Plot
it Unknown what is the plot for this film, but it likely about silver sable & black cat teaming up 

Why It Was Cancelled
Gina Prince-Bythewood, who was to direct the film, was unhappy with the script which led to an indefinite delay in production while she and Sony re-developed the project.

Result
The film was cancelled in August 2018 and is expected to be re-worked into two separate films, starting off with a solo film focusing on Black Cat and another about Silver Sable following afterwards.