Heaven

Heaven is a location that multiple religious and cultural people believe exists. It is considered a place one would want to end up in, as it holds positive connotations to themes of eternal peace and happiness.

Canon Media
In the original Welcome to Hell comic, and later the film, Heaven is never actually shown or even talked about. However, in parts of the script that were cut from the final production, Mephistopheles reveals that Heaven has more advanced technology than Hell, which provides individual souls their own unique afterlife experiences; this is the standard he hopes to meet once his workplace renovations are complete.

UC Stories
Within the Universal Clarification Series, Heaven is a rarely visited location that exists on a separate plane of existence. It is the known homestead for Providence and many other angels that choose to stay after death. The technology in place allows each residing angel their own unique version of paradise without disrupting anyone else's, which is something that Mephistopheles hopes to achieve in Hell by undergoing renovations. Pending more...