According to the official press release, the teaser will be revealed along with a guest appearance by star Benedict Cumberbatch on the April 12th episode of the late night talk series. Here is an official description of the Doctor Strange movie:
“Cumberbatch is set to star as Dr. Stephen Strange alongside Tilda Swinton as the Ancient One and Chiwetel Ejiofor as Baron Mordo. Strange is a brilliant but egotistical surgeon who travels the world to restore his skills after a car accident leaves him unable to operate. In his travels, he meets the Ancient One, who teaches Strange the ways of magic in order to protect the Earth from a host of mystical foes.”
Directed by horror specialist Scott Derrickson (Sinister,) Doctor Strange serves as Marvel Studios’ first full foray into the realm of the supernatural.. Based on characters originally created by Steve Ditko, Stephen Strange is a brilliant but arrogant surgeon whose life falls apart when his hands are injured in an accident. Seeking a miracle cure from the mysterious mystic The Ancient One, he instead learns to use the magical arts and becomes The Sorcerer Supreme, tasked with protecting the living realm from incursions by demons, ghosts and other supernatural forces.
The Doctor Strange trailer reveal will come amidst a full week of programming on Jimmy Kimmel Live set up to promote the release of Civil War – one which will feature Marvel-related guest-spots throughout. “Team Captain America” (Chris Evans, Sebastian Stan, Anthony Mackie, Paul Rudd) will appear on April 11th, with “Team Iron Man” (Don Cheadle, Emily Van Camp, Chadwick Boseman, Paul Bettany and Robert Downey Jr,) scheduled for the 13th, one day after Gregg and Cumberbatch. The week will conclude with Thor’s Chris Hemsworth on April 14th – though he will at least technically be to promote the release of The Huntsman: Winter’s War rather than Thor: Ragnarok (as the latter won’t be released until November of 2017).
Doctor Strange releases on November 4, 2016
Source: Jimmy Kimmel Live