The actor is filming the next Marvel franchise film in Georgia, where he is all poised to support the "Sherlock" star, reported New York Post.
On the other hand, Cumberbatch is shooting for "The Current War", in which he plays the role of the inventor, Thomas Edison.
When the "Dr Strange" star is through with the Alfonso Gomez-Rejon film, he will reshoot the scenes to replace Lazar's face.
However, according to a source from Disney, "They are not digitally superimposing Cumberbatch onto another actor's performance.