A
we know that the moon has a huge relevance to the story of one piece , it was always there when some events took place in Luffy's adventures
and we know that minks get some power ups when they say the full moon, and i was wondering why Oda let Luffy fight Katakuri inside the mirror world as the moon was full.
and we know that Kaido and BM are allies and that Luffy will fight them or at least Kaido in a night with a full moon till now we assumed it is only because Oda wants the minks to have power ups but what if the moon can empower Luffy as well , and we know that Enel is up there as well, and as you see in the panel Roger was talking about the one piece while the moon is full.
I know Luffy grew much powerful with his advance armament but Kaido is still much stronger in my opinion forget about that BM is there as well , in Luffy's alliance there is no one yet who is a first commander level yet , forget about someone who could be in the way of Kaido or BM , so that Luffy can fight one of them , the question is Oda is giving Momo Zunisha , Shirahoshi the see kings , Vivi maybe Pluton , but could Luffy as well have a power related to the moon ,like amplifying his haki more , any one the full moon has for sure relevance and maybe not only to the mink but for Luffy himself as well