I recall reading that using solely the "Disney" name is a synergy thing to keep a concise consistent brand identity and to have a name quickly identifiable on small screens like iOS devices and the like. So instead of having some things be Walt Disney and others go by other names, it's all just "Disney" now. Which, I guess, kinda makes sense, but it seems a little goofy to me. And it does mean that some aspects of the company, like the Muppets, lose some of their unique branding for it, at least on the packaging.