Here's the thing. It's 2016. Not 1986. The world has changed. Media has changed. Wall Street has changed. Society has changed.
Sometimes folks talk about WDW like it's in some bubble immune to outside forces of time.
With "synergy" - the parks have always been part of that. Heck Disney built Sleeping Beauty's Castle before the film even came out, much less before it could be deemed a "classic". Frontierland existed because one of Disney's top live action franchises was Davy Crockett (and one of the first notable mass advertised consumer items to children based on media was a Davy Crocket coonskin cap). 20k Leagues was built based on a newish film (based on a nonDisney created property, to boot).
They are going to build things that appeal to the mass audience today because they can't spend $200M+ on an attraction for a "this might catch on" idea. It's just reality. If they are finally spending the kind of money that needs to be spent, they are going to spend it on things to complement existing business interests. No other management or CEO would or could do differently because if they did, they wouldn't have the job long.