I also think any chance for Disney to play dirty, went away when NBCUniversal and Nintendo announced their joint collaboration; not just when they got Warner Bros. for Harry Potter.
Since 2015, Universal and Nintendo have not only begun more on Osaka; but now on collaborating with the owned Illumination on animated films featuring Nintendo characters.
The only chance I see Disney going all out on growth for the parks, is if they intend on using 20CF as soon as once the deal closed. But until then, I don't see it having as much of an impact for Universal on the southern endeavor.