Beyond the work on films like Transformers, ex-Imagineer Thom Schillinger has done some pretty incredible work that was never built for Disneyland Paris.
The legendary Tarzan Coaster? Check. Other coasters themed for the Paris park's Adventureland? Check. I won't post the concept art for you- since finding it is part of the great discovery on his blog. It's filled with art for video games, comics, films, theme parks etc. Go here for a great couple of hours of searching his blog for hidden and not so hidden gems!
(Art copyright Thom Schillinger.)