Disney probably doesn't need a blockchain, but they do a fair bit of research. Considering Disney already has a relationship with its customers, a centralized system works best. In fact, this is what they're doing now with their wristband payment/identity system. Considering they just invested $1bn into this, I suspect they're going to be using it for quite some time.

https://www.wired.com/2015/03/disney-magicband/