WDW's problem is like the big Battleship problem, namely it takes a long time for it to make a turn. Their recent expansion mostly occurred because they were reacting to the success of Hogsmeade, and then Diagon. If those didn't happen, it's probable that only a couple of new rides would have been added this past decade. After Guardians and Tron open, they don't have a whole lot ready to go, albeit a parade or show. And Disney, as we all know, is slow to build. Pandora/Batuu/etc. were slow builds. So there's certainly going to be a time lag on major new attractions once this recent phase ends. And that's when Disney will be most vulnerable....And, that just happens to be when Epic will open.