Death is the end,
This is pure conjecture.
When John was shot, he didn't say, "Oh no, I'm going to die." He said, "I'm shot." I think perhaps all that would have bothered him would be to leave Sean and Yoko. John put a lot of profound thought into life and death and all points in between. I still love this quote from him:
"I BELIEVE IN EVERYTHING until it's disproved. So I believe in fairies, the myths, dragons. It all exists even if it is in your mind. Who's to say that dreams...aren't as real as the here and now?"John Lennon