Latino Review reports that Marvel's proposed film based on the "Doctor Strange" comics will sport three different villains from the comic books:
Dormammu, an ancient being from an alternate dimension who serves as the film's primary villain
Baron Karl Mordo, a sorcerer and fellow Ancient One disciple who is the secondary villain.
The Mindless Ones, super strong beings controlled by the will of another.
The news is based on Thomas Donnelly and Joshua Oppenheimer’s script for the film which is several years off, so is subject to change.