Luffy observed Zoro's reaction and didn't say anything. Before joining the crew… scratch that, just before the fight with Mihawke, Zoro's will wasn't even close to unlocking Armament. But it seemed fighting a powerful opponent and being exposed to two different Conquers Haki at the same time, made his 'will' grow like weed.
Jon store the fruits, and he'll think of how to use them later. Every power have potential to be very strong. It depend on how the user maximize it and grow it. Even Saitama can't kill a mosquito, so it must have a very high potential.
I thought its "Harry Potter and The Last Gun Bender"
He lived poorly and mostly lived in the muggle world, but, he knew about the magic world and that he was a wizard. He bravely acted in world wizarding war and saved many magic families with his magic guns. He also participated in the muggles world war 2. The world had forgotten about him as he had disappeared after the world war.