The 2003 Haunted Mansion movie stands out as pretty bad, even in a sea of middling Disney theme park ride movies—that oddly specific, yet well-populated genre. But one of the creators behind Kubo and the Two Strings pitched a pretty awesome-sounding reboot of the idea, that would’ve given it an animated twist.
Source: Gizmodo – Disney Passed on What Could Have Been a Great Animated Haunted Mansion TV Show