With Sneasler gone I'll say this, Ogerpon-water is the next one on the chopping block. It'll take it's place in ho with both of them having sd, a speed stat of 350 beating nearly everything in the ou tier, and easy setup opportunities such as using Alomamola. There isn't anything that can check Ogerpon-water well because it can basically 2-shot almost anything with an sd and some sort of damaging entry hazard. Even the most physically defensive mons are forced to tera just to have a chance at it. Ivy Cudgel is just insane, the high crit rate and spamability of this move makes it super easy to end games with just 1 crit killing blowing past a potential check or even outright killing it. I almost forgot to mention that it can tera water increasing the power of ivy cudgel as well as making faster mons such as specs Dragapult unable to kill it with that spedef boost. The fact that it also has 0 drawbacks and isn't contact makes it hard to chip or cripple pon. The way I would see people trying to beat Sneasler was to either hope for a paralysis from Zapdos, outright tank it(although dire claw could mess you up), or you would use priority with his weakened defenses such as gambit. Speaking of priority, it's defensive typing and stats are great, being able to take powerful hits such as banded Rillaboom grassy-glide clocking in at 85.7% or even A-ninetails 4x super effective STAB freeze dry only having a 12.5% chance to ohko. You might say that a little chip is all it takes to take pon down with it having no way of passive healing. But there is one move that although isn't the standard, fits really well with his kit, horn leech. While on the weaker side, horn-leech does a great job at allowing it to not get revenge killed by priority and continue it's sweep but if that's not your cup of tea, trailblaze also works allowing it to out-speed every pokemon after a single boost besides be Valiant. I almost also forgot to mention that pon's allies enable it to easily snowball teams such as Gholdengo who can take all the super-effective hits that would kill pon and prevent hazard removal and Zapdos who can switch in and cripple pon's checks.
TL;DR:The combination of amazing offense and speed, great defenses and typing, the abundance of hazard stacking, and setup opportunities makes me think that pon is next to be suspected or outright banned.
Although, one could make the argument that Gholdengo would be next because of it's presence allowing hazard stacking.
