Actually, I believe the entrance to the proposed Rhine River attraction can be found in the Germany pavillion - just looks like a facade now (Martin can probably confirm this with a pic, right bud?).
I do know that the Canadian government didn't pony up for the Canada pavillion because Disney was insisting on using too many stereotypes in the pavillions - lumberjacks, Mounties, etc. They were involved in the film, but turns out they did have some issues with the final editing - voiceovers and the like. And the song - it's not bad, until you hear the 'French' singer. She mangles the language and isn't even that good of a singer. My own French is passable at best, and I could tell, she s--ked...
I am really hoping that the new movie for Canada shows a marked improvement over the last one - it was okay - but the many stereotypes were too much...