This is an existing roster in Wrestling Revolution 2D, Booking Revolution 2D, and Wrestling Revolution 3D. It can only be accessed by tapping the magnifying glass icon on the top right corner next to the main rosters and searching through the names of wrestlers who are deceased. The roster has no booker (since it is just a list) and is unplayable in Wrestling/Booking mode. You cannot rehire the dead wrestlers, as they will say "In case you haven't noticed, I'm dead! This whole entire conversation is in your imagination."
Moreover, they would keep their contract and appearance the same as in the last roster they were in during their lifetime.