The Haunted Mansion is a recent Disney film based on the classic Disneyland ride. In 1969 The Haunted Mansion opened and as far as Disney went, it was darker than the rest. Granted, the Happy Haunts of the ride are mostly meant to be inviting and lively despite being dead, but this fan-favorite ride holds some sinister backstory.
Source:https://www.cbr.com/interesting-ghosts-haunted-mansion/