If you go to the first page of the DIS Official Cake Thread Kimmers posted, there is an index of all the cake photos in the thread. After that first Haunted Mansion cake was posted, a ton of other people ordered Haunted Mansion cakes at the Contemporary, so there should be some other ideas in there for you.
Where did you have it made? Only certain Disney bakeries can do the fancy cakes, but the Grand Floridian, which would make your groom's cake, is one of them.
What we did for our elaborate Christmas cake at CA Grill was search for "Christmas cake penguin" on Flickr.com, grab all the photos of cakes we liked (and there were TONS), and cut and paste the elements to create a mockup for the baker. You wouldn't even have to go that faryou could just send him the photos and say you want X from this one and Y from that one...