I kind of hope it is H3, not because there's anything actually juicy to talk about that hasn't been covered at great length already, but because of the amount of online leftist infighting it'd cause. There's so many angles it could backfire on him from: the H3/Hasan fallout was huge and everyone in that particular audience has very firmly picked a side, Ethan is incredibly outspoken on the Israel/Palestine shit which is obviously a hot-button topic for them right now, and they've been dealing with actual irl harassment recently from redditors making false reports that Ethan was abusing their children - so making a video shitting on him now would be "dogpiling" which is a big no-no (and one of the things Ian explicitly disavowed when crying about his old videos).
Let them all fight. It'll be funny.