Yup. They are Eddie Valiant and Roger Rabbit.
As you probably know, “Who Framed Roger Rabbit” was canned for a while since Disney bought the rights to Gary Wolf’s novel “Who Censored Roger Rabbit?” and the Mouse House’s executives were trying to pull a movie out of that bizarre yet funny novel, until they gave up because they didn’t have the budget for a project like this one.
Well… 2719 Hyperion bring us this pic from the 1983 Disney’s Annual Report, in which a Roger Rabbit movie is mentioned as being near to its theatrical release (little did they know that the movie would be actually premiered in 1988, with a very different look and feel). This photograph shows Mike Gabriel (a Disney animator, storyboard artist and character designer) dressed as Eddie Valiant, along with Roger Rabbit in his first incarnation, mainly inspired in Tex Avery’s cartoons as the design suggests.
You can read more about this in 2719 Hyperion’s entry about Roger Rabbit, 1983-style =3