I think it's exactly the trend, and the public is at least in part to blame. We've all heard people recently say, "I'm going to Florida to see Harry Potter." I don't think I've ever heard anyone say, "I'm going to Florida to see Universal." Certainly not recently.
Soon, we'll be hearing, "I'm going down to see Avatarland." Or Star Wars land. Or Carsland. That type of branding is probably the future, and everyone is jumping on board. Soon, "I'm going to Anaheim to see Marvel Land." Watch out, it's coming. In this short attention span world of been there done that, new things not only need to be added, they need to be summed up in a few short syllables. "Disney" is too broad of a term. One year it'll be Avatarland, then Star Wars land, etc . . . Such buzzwords more easily create excitement and interest, and our short attention spans let them do it. No one will say, "I am going to Disney to see all of their diverse and separately branded offerings." No, 5 syllable or less will be needed.