One Life to Live has had Vicki go to Heaven; Clint and Vicki went back to 1888, where some cast members played their ancestors; the underground city of "Eterna"; Vicki also had a guardian angel named Virgil appearing now and then.
General Hospital has had Edward Quartermain as a ghost and then he turned up alive and they ignored the two years he was a ghost!
Then there's the kid aging trick which hasn't ever gone out of style, and DS never used that one.