Deep

On June 11, 2012, Shane Acker confirmed that Burton would work with Valve Corporation to create his next animated feature film, Deep.

Deep would have been another darker animated film, as Shane Acker has expressed his interest in creating more PG-13 animated films.[106] Since then, there has been no further announcements. However, despite the silence from Acker, in January 2017, the Facebook profile of the character "the Scientist" was updated with a rather cryptic message. The profile had been inactive since 2009, leading some to speculate the teasing of a sequel.

Plot
Like 9, the film will take place in a post-apocalyptic world (although set in a different universe)