Would Fantasmic work in the Magic Kingdom, in the Rivers of America, like at Disneyland?
You obviously wouldn't get as many people watching it as the 9,000 capacity Hollywood Hills Amphitheatre, but I wouldn't mind seeing the show in it's original format - with the Pocahontas scenes and all, but using the Liberty Belle at the end etc.
While we are talking about Pocahontas, I found the scenes fit the show perfectly actually. I am on about the Disneyland diehards who criticise MGM's version for using more up-to-date characters that do not share the place in peoples hearts, as say, Peter Pan - yes, Peter Pan is soooooooooo much more famous, but the theme of the actual scenes that are portrayed are actually quite moving (Colours of the Wind, the Grandmother Oak). Yes, they could lay off the monstrous head that the Lord man wears, and the battle scenes are quite odd, especially as the film isn't very popular and/or famous.
Anyway, that little rant about Pocahontas has nothing to do with what I wanted to say.
They could take Fantasmic down for a few months, and devise a brand new show for the Amphitheatre - not necessarily at night but I think its more special going to see a night show when the park has closed - while editing the more loose parts of Fantasmic, and adapting it for the Magic Kingdom. I think it would be amazing at the MK, and they could use parts from Disneyland, such as Ursula etc. They could show it 15min before/after the fireworks, yes that would make for awful congestion in the entire left side of the park - Liberty Square, Adventureland, Frontierland, maybe even Cinderella Castle - but it would make for memorable nights at the MK especially with SpectroMagic as well.
In fact, they could show SpectroMagic, then show Fantasmic. That would loosen up congestion in Main Street, as people would clue on to the fact that the parade starts in Frontierland (oops no it doesn't, thats Share a Dream, but they could start it in Frontierland) so they would watch the parade then grab a place for the show, or people waiting for the show could watch the parade while waiting.