LOVE this movie...and there are TONS of little gags that were animated and cut last minute that have to be out there. New to the forums and not sure how you post images here, but I have some from some scenes that never made it in.
Also have, as I said in the Theif thread, the "Roger Rabbit And The Secrets Of ToonTown" special, which is a great, technical, 50-min doc.
The pig-head scene was not complete on the current Vista DVD (shameful!) and was a hybrid cut that showed part of it in pencil test. I know this was fully completed (it was the first part of the movie to be done) and would love to see this back in properly, where it belongs.
Regarding the Roger shorts: the last one, Trail Mix Up, contained a "Rugged Tools" (or "Ragged Tools") joke with a woman straddling a chainsaw (as Roger flied past to save Baby Herman from the saw mill). On the UK VHS, the background was all "mushed up" so that we couldn't see the poster. On the original CAV LD (which I have), the poster is clearly there.
I'm not sure which one is on the Vista DVD, but a part of me thinks it could very well be the "uncut" version.
The Vista series was a disappointment - instead of the redundant pan-and-scan/open matte version, I'd have much preferred a complete history, with all the pre-Williams and Zemeckis plots and tests in there.
Finally...for someone looking for a Dick Tracy trailer...I have one on VHS (under "Walt Disney Pictures" no less), as well as off-air recordings of a half-hour promo doc, and (I think!) an EPK thing that runs about seven minutes.