Vivre card says CoA and CoO only, however, a lot of character are like that in vivre cards, including Garp, so it's still not certain what Oda will decide.
There is also a difference between being a basic CoC user, and being an advance CoC user. It's also interesting that Zoro got an advance CoC technique without even using the basic CoC like Kid, Chinjao, Doflamingo and Katakuri uses etc. , however, my guess is that Zoro's version is weakest advance CoC technique since he doesn't even use CoC to KO fodders, and he doesn't even understand his attack had CoC in it, he did it unconsciously, so obviously consciously advance CoC attacks will be superior to Zoro's unconscious advance CoC.
Chinjao states that the top fighters has CoC and BB is at the top of them.
Oda could give BB CoC like he gave to Chinjao, Doflamingo and Katakuri, and still not use advance CoC in his attacks, that wouldn't make a huge difference. So the question is, is he going to use advance CoC in his attacks? Probably, but CoA + Gura is already too powerful, plus he has Darkness gravity pull, which will turn Luffy's Rubber defense into nothing. So it's totally acceptable if Oda doesn't give him advance CoC in his attacks, because he will have;
Gura + CoA + Darkness which can neutralize any DF defense, so not only against Luffy's rubber, even against Hybrid Kaido, when Blackbeard hits Kaido, Kaido won't be able to tank it with his own Dragon scale DF defense, as well as any logia user won't be able to escape from Darkness's offense.
Blackbeard is probably the only person who can break rubber Luffy's bones. Because CoA doesn't cancel the DF powers, Luffy gets damage from CoA attacks, but he never breaks his bones, Darkness can do that.
So if he also gets Gura + CoA + Darkness + Advance CoC, he would probably be too overpowered even for a final villain, so we will see.
As for the arguments that says BB begged Trashbeard, you need to understand the relationship between BB and Trashbeard, BB once admired Trashbeard, but later he says Trashbeard got old and weakened. And Trashbeard accepted BB as his son once, so BB knew Trashbeard's sons is his weak point, BB used that to use his advantage, but Trashbeard didn't fall for BB's ''act'' and he tried to kill him. BB could call his crew before begging to Trashbeard, he could no-diff Trashbeard with his crew anytime he wanted. So that should debunk this idea of BB begging to Trashbeard, when he could call his crew before if he wanted.
If this is not enough for you what kind of coward throws away his Shichibukai title and challenges every Marine in Marineford, includes even Admirals? That was before being a Shichibukai. We know Doflamingo or Mihawk would never done this, they kept being a Shichibukai until the end of it, if Mihawk comes Marineford and says ''I am done with being a Shichibukai'' to the Admirals, then you can compare someone like Mihawk to Blackbeard.
Mihawk comes to marineford only to obey the commands of the World Government (which is fighting against WB pirates) and then he admits to Perona that his own island won't be safe if he loses his Shichibukai title, and he will be forced to leave his island because of losing his Shichibukai, he can't even protect his own island against the marine forces.
And before this, BB without even Gura again, invades Impel Down, and again throws away his Shichibukai title, then he underestimates Magellan, and BB doesn't beg to Magellan for an antitode. BB could say ''spare me, give me an antitode, I am a Shichibukai'' kind of thing but he didn't, he even later says to Shiryu that
fearing from death is only for losers.
Oda's portrayal with BB and BB's actions completely contradicts with BB being a coward, on the contrary, BB should be craziest guy around, who can come to Marineford when all Admirals were there, and he can throw his Shichibukai title, without even having Gura, so it makes absolutely no sense to say that BB isn't the craziest guy around, even more than other Shichibukai like Doflamingo and Mihawk.
Of course, some ''so called Blackbeard fans'' (who are essentially Mihawk fans), won't like this comparison, but it's still a fact.
