I also like One Man's Dream, and it is pretty much The Walt Disney Story that used to be where Tony's Town Square Restaurant is. It was fascinating, had a short movie on Walt, and had that big model of Epcot in it.
I really love the idea of a Universal Museum, and I would love to see Gardens of Allah put to use, as long as they keep it looking somewhat the same. This is such a beautiful, peaceful area of the park.