No, The Simpsons didn’t predict the death of the Queen. For the love of god, please stop acting like The Simpsons predicts everything.
Making an origin story TV show based on Batman’s butler is already pretty much at the peak level of “sure, why the hell not.” As is adding the Wayne family for good measure, because clearly restraint is already out the window. Thomas and Martha are basically a package deal. As is…maybe the Queen of England?