no john..no plastic ono band..
I completely beg to differ.
John and Yoko decided in 1968 that whatever music they made after that point would be credited as 'Plastic Ono Band'. They even used the pharse, "YOU are the Plastic Ono Band", meaning that everyone was apart of the band, and the band was really formed to encompass all of the people that played with them. (People like George, Ringo, Klaus, Billy Preston, Alan White..etc)
So, she wants to use the name of the band for musical endeavors today, I don't see the problem. There would be no 'Plastic Ono Band' without Yoko she can use the name. And I'm pretty sure her sole purpose isn't for money, I would like to think she has enough of that.