@.access:
Yeah, but what about the Daifuku, Oven, Perospero and the likes on the Beast Pirates? The Big Mom Pirates had a lot of monsters who were not among the Sweet Commanders but clearly the Headliners are not going to be around that level (we already saw Holdem, the headliner immediately below Jack, and…).
A headliner being as strong as a supernova at this point apparently seems to be exclusive to the headliners who are a supernova, as every other headliner we saw so far is leagues below that level - and the supernovae are not real real real Beast Pirates, they are just a temporary addition, Kaido's crew can't seriously have just him and the 3 Calamities as threats.Even if we have more All-Stars, we'll still have the 3 Calamities to be a parallel to the 3 Sweet Commanders (and even the SC were actually 4 until a while ago). Actually, we always thought of the Calamities as being the Sweet Commanders equal, the term All-Stars only appeared a few weeks ago.
Why is that clear already? The arc's just getting started. You bring up Oven and Daifuku, but we didn't even know they existed until Ch. 861. (And Katakuri in Ch. 860.) And Perospero wasn't confirmed as a "monster" until that chapter as well.
It makes far more sense for there to be stronger Headliners lurking about than for there to be more than 3 current All-Stars IMO. The only thing I would say is apparent so far is that perhaps SMILE users aren't worth taking seriously. (Outside of maybe Sheepshead for the weaker SHs, if he's still alive anyways) If the first decent Headliner is an actual Zoan user, I wouldn't be surprised tbh. In the end, it's not like it truly matters which of us is right here I suppose, as we'd get stronger crew members regardless. But I would certainly find it odd if there were more than 3 All-Stars.
And yes, the Calamities are the Sweet Commanders' equal. It doesn't really matter that there used to be 4 of them; when we're introduced to them, there is currently only three of them. As for the All-Star rank, we were not introduced to it recently in Wano. We knew about it since Zou, though it was the synonymous title of "Lead Performer". It's just that everyone preferred to refer to them as Calamities I guess.