Valid point about the scar, it is definitely just speculation within speculation at this point.
But its a fact that those holes were caused by Ryuuma, read the rest of the chapter, or look in the panel beneath it.
mhmm, and it maybe couldve been caused by a cerberus claw too. My theory is just as speculative as your theory.
Well, its the most practical assumption, not the best (in my opinion).
Both sides could explain loose ends (although I believe the Cerberus theory would tie up many more loose ends).
And yes, I believe that he had another power before darkness (cerberus)
Not necessarily, either side of the spectrum would keep others with two abilities.
This point could be used to support my theory too.
He couldve wanted the ability for several reasons. Not just so he could acquire Newgates fruit (although I believe thats how he extracted the fruit).
I really don't get why people think BB has another power. It's practically impossible. Him having two powers is a feat on its own. It just can't get higher than that. Not unless Kubo is OP's secret manga writer.
He has many uses for it. But face it, he was up against the strongest pirate in the world, and he couldn't even be sure that Ace would follow him, thus triggering the war. It was a huge risk he was taking. and finally, he admitted to have wanted that power. He was prepared to take it. It was luck, but things went as he hoped they would.