Director Sam Raimi candidly described the reason why he dropped out of the World of Warcraft movie, saying they allowed him to work on the movie project for nine months before rejecting it. Eventually, Raimi decided to pursue the project Oz the Great and Powerful.

“Honestly, I think it was mismanagement on their behalf, not to explain to us that the first story was vetoed long ago. Why did they let us keep working on it Were they afraid to tell me ” said Raimi. “First, they asked me if I wanted to make it, and I said, ‘Yes, I love World of Warcraft, and I think it would make a great picture.’ So I read a screenplay they had that was written by the guys at Blizzard, and it didn’t quite work for me,”

“I told them I wanted to make my own original story with Robert, so we pitched it to Legendary and they accepted it, and then we pitched it to Blizzard, and they had reservations, but they accepted it. Then Robert wrote the screenplay, and only once he was done did we realize that Blizzard had veto power, and we didn’t know that,”he continued. “And they had never quite approved the original story we pitched them. Those reservations were their way of saying, ‘We don’t approve this story, and we want to go a different way,’ so after we had spent nine months working on this thing, we basically had to start over. And Robert did start over, but it was taking too long for the people at Blizzard, and their patience ran out.”

Source: Vulture