I know that I am not likely to be successful in convincing you your memories maybe skewed, but I have to say that the Avenger Monorail was never on the Epcot beam. The Tron-o-rail, the wrap previous to the Avengers was used exclusively on Epcot because it was felt that it did not work with the MAgic Kingdom's theme. The previous posters are correct in that the Avenger monorail, and now the Iron Man monorail are exclusive to the Magic Kingdom Beams due to the contract restrictions with Universal. Disney is not allowed to use the Marvel characters in the Florida theme parks, and since the Epcot beam passes through the park, it would be a serious violation of the contract as it reads right now.