Bassist Jim Riley was recently let go for past use of a racial epithet.
The long-running variety show has acknowledged its flawed vetting process.
On her show last week, Ingraham mocked the late rapper just mere hours after his memorial service in Los Angele
It marks the second straight time Slipknot have parted ways with a band member prior to a new album release.
Disney has “every intention of using” James Gunn’s script for the third Guardians movie.
Vann has been accused of sexual misconduct by at least two women.
In a statement, the band said they were “shocked by these disturbing allegations and we were not previously aware of them.”
Buckingham was fired from the band after declining to participate in their upcoming North American tour.