I think that if he lives he will not come back.
Perhaps we also have an indirect comeback? His music has meant a lot, maybe he continues to work as a songwriter for other artists under a different name? So we have something from him and he unconsciously. Something from us
At the memorial, again the image of Liberian Girl was shown as he sits behind the camera, there are some signs (perhaps even from himself) that he lives "I live and I'm here forever" .. Would be for me sign, "I live, I work behind the scenes on," so he really lives yet but just behind the curtain as a songwriter, composer, writer and everything he wants and does not really obvious, is to just stay incognito, I hope know what I mean. He has the reins in his hands, but not on stage "behind" the stage
I hope he's healthy and happy and not exposed to pressure
sorry for my bad english :-\