Disney would be doing a lot of IP based stuff regardless of Uni. That's just the nature of the business now. Most people want Ips and if you're going to spend a billion dollars, you want to make sure people will come to what you're building. I'm not saying it's right, I'd love more original stuff, just that it's the nature of the business now.
That being said, thishuge push with Pandora, star wars, toy story, and marvel is almost certainly reactionary. General public saw Potter land and said "Uni is doing Disney better than Disney does!" Disney wants to prove those people wrong and bring back the crowds with heavily themes IP based lands even if that was rarely the focus of Disney before Potter.