Even if Showdown got shot down, ultimately, that wouldn't mean a lot at the end of the day because a new one would pop up and most importantly, the banlists would be as relevant as ever.
Smogon metas are too deeply entrenched in the community as a whole to be nuked like that.
Unless Lysandre pops up from his grave with a steel chair and the ultimate weapon on hand. Then we might be in trouble
It kinda looks like they're going with some Masters League style like the final season of the Ashnime.
It should work tbh.