The animated Fox series, currently in its 37th season and renewed for at least four more, is widely considered by fans to be past its “golden age”, with recent episodes often dividing opinion.
Shearer clarified past rumours regarding a 2015 contract dispute, stating that he did not threaten to leave the show, but rather Fox threatened to continue without him.
He confirmed that a second movie adaptation of The Simpsons is planned, which will be released more than two decades after the original 2007 film.
Separately, Shearer addressed the tragic deaths of Rob Reiner, who directed him in two Spinal Tap films, and his wife Michelle, who were fatally stabbed last December, leading to the halting of plans for a Spinal Tap concert film.