Also im sure you saw sasuke chidori chakra is black now i think now because .now sasuke has access too nature chakra the last time it was black is when used cursed seal level too in thats juugo which is powered by natural chakra.
I think the land kaguya came from was the land of samurai and if she already had byakugan that mean she already had access to chakra samurai use chakra maybe they kept to themselves on how to unlock it.
It looks obvious to me that hyuga clan came from the second sage kids. this also means theres another clan like senju that have the body power while hyuga have the eye power.
I think silver is his evil twin .who use transformation magic to change his appearance cause he hated to look like gray 'and thats why he smell like gray.
maybe the final upgrade is a fusion of all three eyes to unlock a new with power that the other eyes powers look like garbage, Sharingan is yang and byakugan yin and rinnegan is wuji .all three most combine to recreate the true eye which will represent taiji a new eye with all the other three...
With her healing and strength and summonings I think she could take him out. obito lost to weakened kakashi too I think sakura could have taken care of it.
It seems to me that all the sternritter are dead and they became spirits sence there human after all. If true they obviously dont go to soul society ,are they in hell in been training this whole time, also if Quincy become spirts when they die where's ichigo mom she dead but ichigo has never...
I think Lee taijutsu got so good he might be able to peacock with out gates in other gate stuff, or he be able to use it with out the side affects he found a way to improve on it,also is it possible the Lee has senju DNA all of Lee power ups have been body like naruto and neji have been eyes...
There was no proof that he quit but the paper which he could told to print to make it seem he quit and have the marines in wait bet they jump at the chance to get luffy ago and law.