Jurassic World: Fallen Kingdom director J.A. Bayona stepped away from helming Brad Pitt?s World War Z sequel just before its planned production start because he wasn?t the right fit for the job, Bayona told Den of Geek. ?We were working on that project for around a year, and we had a great idea,? Bayona said. ?We were very excited. ?There was a moment where we were about to start production, and I wasn't ready,? he added.