After finishing the Get Back project and with the single at the top of the charts, the beatles repeated the same formula they had done months earlier when releasing the white album, which was to get away from the beatles and devote themselves to personal projects, John lennon was the most active, with his Bed-in For Peace' in Amsterdam, and his trips to Montreal and toronto. Ringo and Paul went on vacations and met in the south of France. And George harrison stayed in london producing to the new apple artists and enjoying his work as a studio musician. Soon, the 4 would be back in the city and although many doubted about the future of the band, Paul McCartney called George Martin to tell him that the four beatles were planning to record a new album.

After all the tensions of the white album and after leaving the band, george martin remained skeptical, he doubted beyond mccartney's good intentions, he didn't believe that george and ringo wanted this, much less that john with all his projects wanted to return to the same thing, and before martin's questioning towards mccartney, paul was very clear: You don't have to worry about it, we want to work like in the old days, and we want you to produce it.
That's how abbey road was born.