EXCLUSIVE: Rob Letterman is out as director of the DreamWorks Animation film Captain Underpants. Despite being dealt a potential atomic wedgie, DWA is in talks to replace him with David Soren, who helmed Turbo for DWA and is being fitted for Captain Underpants right now. DWA could not confirm. In the Nicholas Stoller-scripted adaptation of the Dav Pilkey book, two mischievous kids hypnotize their mean high school principal and turn him into their comic book creation: the kind-hearted and elastic-banded Captain Underpants. The voice cast includes Kevin Hart, Ed Helms and Jordan Peele. A quick deal should keep the film on track for its March 10, 2017, release through Fox.