While I typically swerve clear of conjecture and fake imagery, this post is dedicated to the pursuit of clarity because this particular fan-manipulated imagery has been causing a good deal of confusion.
I’ll be clear: The Two-Face images below for “The Dark Knight” are fake. The character still hasn’t been revealed. The first photo below is the original Aaron Eckhart [1] photo from the 2004 film “Suspect Zero”.

Aaron Eckhart in “Suspect Zero” in 2004.
Photo credit: Melissa Moseley, Paramount Pictures
The Photoshopped fan version, which clearly comes from the above “Suspect Zero” image, is below. These mockups have been posted on various discussion forums.

A fan-manipulated version of Aaron Eckhart designed to
look like Two-Face in “The Dark Knight”.
I can also confirm that the following mockup comes from “The Black Dahlia” in 2006.

A fan-manipulated version of Aaron Eckhart in “The Black Dahlia”
designed to look like Two-Face in “The Dark Knight”.