It won't be the Frog Chorus, Roo. Obviously, it might pop up once or twice, but it's not the worst thing that could happen...
No, the worst would be "Temporary Secretary" - a song so irritating that I heard it only
once, in 1980, but it managed to burn its hideously trite chorus indelibly into my brain. :(
However, I strongly suspect that the song we all really have to fear on that day will be "Ebony and Ivory".
Always in tandem with its Evil Twin, "The Girl is Mine" (I know Macca didn't write that one). Makes me grind my teeth every time I hear that stupid word "doggone". :x
And plenty of other Sugary Bilge (my standard term for McCartney's entire post-Beatles career) to choose from.