Just because they directed the previous films doesn't mean they are only ones who can direct any future films. There are a lots of other directors and/or writers that can do it and have proven their worth in previous hits. And these directors listed as example have had various results in their carrer by boxoffice, fan and critic reaction, but they can do TENFOLD a better job. EXAMPLES: Martin Campbell (Casino Royale, GoldenEye, Zorro) Paul Greengrass (Bourne Supremacy and Ultimatum) Francis Lawrence (Constantine, I Am Legend) Joe Johnston (Jurassic Park 3, Hidalgo, Jumanji) Christopher Nolan (Batman Begins, The Prestige) Wolfgang Petersen (Air Force One, Das Boot, Troy) Tony Scott (Deja Vu, Man on Fire, Enemy of the State) Edward Zwick (Blood Diamond, Last Samuri, Glory) Len Wiseman (Live Free or Die Hard, Underworld films)