Just to muddy the waters, here's an article quoting a noted Beatles expert stating that, after Abbey Road was recorded, Lennon convened a meeting to talk about a Xmas single for 1969 & a new album with 4 songs each from Lennon, McCartney & Harrison plus 2 from Ringo "if he wants them"...
Interesting if that is real.
All they needed was a break, take a couple years off and they probably would have worked as a band again.
They almost did even after such a bad break up.
In the end Paul WAS right and went on to become one of the wealthiest musicians ever.