The space between Tomorrowland and Main Street, USA, approximately where the Main Street Theater was to be located, is where the attraction was initially slated to be placed way back when it was going to be co-developed by the Magic Kingdom and Shanghai Disneyland along with Seven Dwarfs Mine Train. Space Mountain wasn’t just dropped into Disneyland once the decision was made to add that attraction. Space Mountain and Tomorrowland were adjusted to work together as part of a larger experience. TRON should have had it’s design adjusted to integrate into Tomorrowland, not just be a thing over there.