Trank announced that he was leaving the project via a statement from Lucasfilm that made it sound like it was his choice to walk away from the unnamed project.
“After a year of having the incredible honor of developing with the wonderful and talented people at Lucasfilm, I’m making a personal decision to move forward on a different path. I’ve put a tremendous amount of thought into this, and I know deep down in my heart that I want to pursue some original creative opportunities. That said, the Star Wars universe has always been one of my biggest influences, and I couldn’t be more excited to witness its future alongside my millions of fellow Star Wars fans. May the Force be with you all.”
Rumors flew that Trank was having disagreements with the studio over the direction of the film when he didn't show up for a panel at Star Wars Celebration. That was the panel where director Gareth Edwards (Godzilla) revealed that his Star Wars spinoff was titled Rogue One and would be centered around a rebel heist on the Death Star.
Still no word on what the other spinoff that Trank was supposed to direct is going to be about. Trank is the director of the Fantastic Four movie that comes out July 30.