Their stories are a real life soap opera.
If John Lennon hadn't been killed, I think they would have regrouped in the mid to late 80's.
In the late 70’s SNL would have this recurring skit offering $1,000 to the Beatles to reunite on the show. There was a story that Paul was in NY visiting John and they were watching the show and joking that they should go down to the studio and walk on and perform. Alas, this never happened.