I'll switch to the multiverse, with the setup being healer Retsu Unohana and DPS Shiraishi, starting with the One Piece world.
If the Original Gotei 13 were to be developed, it would require a long storyline. The Hell Arc couldn't handle it, so it's best to leave it for the new book.
Speaking of the new book, the fusion of Kizaru is good, it's popular, and Gilgamesh is also very cool. It starts a thousand years ago, as the first Great Kidō Master, assisting Yamamoto in establishing the Seireitei.
The main female character Retsu Unohana, but he has many ex-girlfriends, Senjumaru Shurata, the Saitō Furofushi, Katori Batsu'unsai, Yoruichi Shihōin, and Kirio Hikifune...
This book made me realize that too many female leads are not good, as they are difficult to develop, and they cannot be too innocent either. The male lead is set up as an ambitious man who accumulates pressure by pretending to be a good person and needs to release it, but Unohana treats him like a younger brother, so he has no choice but to find other women to relax with. They play around and then break up. The Glint-Glint Fruit Karoo and he is not afraid of being killed by a woodcutter's knife.
As for when it will start, it'll be after my laptop arrives. I'll make 14,000 a day. My book on making money by recruiting witches will be 6,000, this one 4,000, and the new book another 4,000. I'll write like crazy, because I chose to be a full-time writer! *^_^*