The push for Harry Potter the TV show is going to be completely enormous—they're debuting it on fucking Christmas—and it is the responsibility of TV critics to contextualize this as rewarding the world's most transphobic billionaire (which is saying something) in everything we write about it.
Not sure about themed gear or it being incorporated in storyline but it will almost definitely be plugged on the ringside advertisement boards & probably the turnbuckles, at least for 1-2 shows, similar to the way AEW plugs other HBO Max shows.