Pretty sure I saw a tweet capture that showed JK Rowling talking about how she never described Hermione's skin color/ancestry to justify a race swap of one of the main three as well. Still, that series is popular enough with rabid fans that it will still be a success no matter how badly they contort it to be 'inclusive'.
Also, you can guarantee that there will be some gay Dumbledore shit because of her retroactively saying he was even though there is not a single scene in any of the movies or books where it could possibly matter.