I have this theory that the life that Morgan has started to live by WILL RUB OFF ON RICK. In the books Negan causes so much death, hatred and destruction AND YET in the books he's still alive. Rick decides that he will become what Negan ad the Governor were and he decides to imprison him within the camp of Alexandria. Rick will either be persuaded to live the life that Morgan has adapted or he will do it in memory of Morgan if he was to pass.
Personally I hope Morgan lives on through a few more seasons as he's a phenomenal character that was adapted for television without the book just like Daryl.
I do think that Glenn's death role in the book should be swapped with Daryl for television as it would make a stronger impact in my opinion. #NeganIsNear