It's gonna be really interesting to see how rain develops in this meta compared to original black white. This may be a radical opinion, but I honestly think it could be as just as strong in some ways. Stuff like rain stall and rain balance is probably dead, as 5 or 8 turns simply is just not enough to sustain defensive teams that rely on rain. But offense rain might just be as strong. Despite in this meta not having many rain threats like Tornadus, Thundurus, Toxicroak, Keldeo, etc, we do have Pelipper > Politoed. I think Pelipper will be huge bcuz it has U-turn which is going to be amazing for momentum. I think Pelipper/Ferrothorn/Kingdra/Kabutops will be an archetype in this meta, and it will function similarly to SM OU rain. Although the biggest difference between SM and this new meta rain archetype with pelliper is that Ttar will probably be on every single team in this meta and that will hurt Rains ability to do work. But on the contrary, there is no Rotom wash, Celebi, regenerator amoongus, gastrodon to check/wall common rain mons.