Progress on the film stalled during 2005 as Marshall and Spielberg were busy with other film projects. In 2006, Spielberg said Johnston would direct the film. Additional work on the film was expected to begin following the release of a fourth "Indiana Jones" film, which Marshall and Spielberg were working on. By April 2007, Johnston was no longer involved as director. A release date of 2008 was expected, but was later delayed to 2009. By 2010, Johnston was involved with the project again and planned for the film to be the first in a new "Jurassic Park" trilogy. Johnston hoped to further develop the project with Spielberg after they finished other projects, including Johnston's 2011 film, "".