Here are some comparisons between the 2011 Blu-Ray and the new Disney’s Blu-Ray (1080p, not the 4K HDR one, based on screenshots made by blu-ray.com) :
http://www.framecompare.com/image-compare/screenshotcomparison/7DLDGNNX
http://www.framecompare.com/image-compare/screenshotcomparison/9JBJMNNU
http://www.framecompare.com/image-compare/screenshotcomparison/7DLDPNNX
http://www.framecompare.com/image-compare/screenshotcomparison/9JBJCNNU
It really shows how bad the colors of 2011 are…