I'm excited to see the one in Paris some day! If there is a Frontierland movie, go in that direction, make it tie in with the upcoming Haunted Mansion movie. Disney could have it's own shared film universe with the Society of Explorers and Adventurers theme, if it chose to pursue it.
It's possible the Frontierland theme may be somewhat dated now, especially as cowboys were more popular back in the 50's and 60's. However! Pirates in general also used to be dated in their popularity until the movies came along. (Yes the ride itself was still popular over the years, but pirate pop culture in sure saw an increase after the first Jack Sparrow flick).
Roy and Roy Jr both said the films would be the driving force for the parks, however I like that Disney instead used attractions as a basis for some movies, with the obvious goal of adding interest to said attraction. This also makes sense as many attractions themselves have developed their own following independent to any outside IP. I also prefer this move over outright revising each attraction to shoehorn a completely different IP (20,000 leagues' Captain Nemo being deep-sixed in favor of Finding Nemo).