Ray Manzarek who's the keyboardist of The Doors swears that this is a true story and so, here it is.
Manzarek claims that Jim Morrison had a known fascination with the spirit world and that he comes to visit him and also The Doors' guitarist, Robbie Kreiger in their dreams over and over again. In this recurring dream, Morrison returns from France where he died in 1971 and accomplished what he wanted to do which is to rest, get clean and change his rock star lifestyle. In the dream Manzarek and Morrison talk about where Morrison has been and what he has been doing and just when Manzarek asks Morrison if he's working on a new material and Morrison is about to answer him, Manzarek wakes up.
The even more interesting part of this story is that Robbie Kreiger claims to have the same dream as well. So, is Morrison still here to tell us something? I guess we'll have to dream about it to find out...
The Doors - Ghost Song