Given the general timeframe that King of the Elves was in production, I wouldn't be surprised if Chris Williams was ultimately forced to choose between directing Big Hero 6 or King of the Elves. He was probably just a lot more passionate about Big Hero 6, considering that King of the Elves was merely transferred to him (a la Bolt). He probably just wanted his own project rather than someone else's. I understand, even if I probably would have preferred seeing King of the Elves produced over Big Hero 6. It's extremely tough to finish another artist's work when you don't care at all about or have no connection to the story that the other artist was telling.
However, thanks to King of the Elves being shelved, Clay Kaytis left Disney and directed The Angry Birds Movie so...good for him, I guess?
