So you're assuming that Oda is going to invent another miracle cure lol or that not all Straw Hats are going to have a fight, even though BB's crew is a mirror of Luffy's crew. Honestly I don't know which option is funnier but feel free to think whatever you want.
I don't know what happened in OP fanbase during Ennies Lobby days.. But pretty sure, everyone was really sure that
every Straw Hats would get big 1 vs 1 in:
- Fishman Island arc, to show off the result of timeskip training. Reality: Nami didn't get 1 vs 1 against named opponent, Sanji was 2 vs 1ing with Jinbe.
- Dressrosa arc, to fight Doflamingo's family, villain hyped since pre TS. Zoro and Sanji should each defeat 1 High Executive. Reality: half of Straw Hats ran away to Zou, Usopp who left behind in Dressrosa didn't really get 1 vs 1, 2 of the 3 Executives were taken out by Kyros and Law.
- Wano arc. Kaido and his Beast Pirates alone should have enough characters for Straw Hats to get 1 vs 1, let alone with help from Big Mom Pirates. Reality: Usopp and Brook didn't get 1 vs 1.
So yep, stop thinking as if 1 vs 1 is guaranteed in Blackbeard's arc. Who knows, 1 of the Blackbeard Pirates got defeated for real before the arc starts and then 1 of the Blackbeard Pirates will fodderize 1 of the Straw Hats before meeting his real match, to make the number more fair.
So in order for Shiriyu to validate the Suke Suke no Mi, he needs to destroy Sanji while using it?
Not sure if slander or praise.....
Not slander nor praise. I am just giving an early spoiler.