Here's a great find I came across online...
 The Art of Who Framed Roger Rabbit
The Art of Who Framed Roger Rabbit is actually an 
illustrated catalog published by 
Sotheby's for an animation cel 
auction that was held in 
June of 
1989.

The book has a 
9 page description of went into the making of the film and is filled with various animation art used in the movie. A lot of nice images make up this catalog.

It seems they had the rights to sell the 
Disney, 
Warner Bros and 
Fleischer characters but no sight of the 
MGM and 
Walter Lantz characters.

While flipping through the pages, I noticed some images that were not shown in the final picture. This notice was included: 
"All cels included in this sale are images actually used in, or deleted from, or were created in pre-production of the film..."Mary Poppins and 
Music Land can be seen in these cels used(?) during the 
Yosemite Sam scene.

A deleted scene had 
Baby Herman slipping a fin to his nursemaid.

The scene where 
Eddie tries to throw 
Roger out his office seemed to be re-shot and animated.

When the 
Weasels show up at Eddie's, Roger's 
anticipation into his 
wild take was trimmed out.

A scene of Eddie explaining the connection between 
Cloverleaf and 
Maroon Cartoons was deleted.

Here's an 
awesome cel collection that would look nice on my wall. The only time both 
Mickey Mouse and 
Bugs Bunny shared the screen together.

Wonder if any of these are still available to purchase? I bet they would be worth a lot more than what they were 
20 years ago...