One Piece Characters that might be return in Kaido arc..

Kaido arc maybe also known as Wano arc..
Since Wano make Wano Ku Ni as his base after defeated Lord Oden..
He makes ally with Shogun Warrior in Wano Ku Ni..

So, which characters might be return for Kaido arc..?
Let me briefly explains on names that I think got link to this Kaido/Wano arc..
The characters are:
i) Gin - We 1st meet Gin was at Baratie.. Sanji help him with giving foods.. He's starving to death at that time.. Why Gin will be in Wano..? Gin got the theme of snake (I think it's rice snake.. Maybe that rice snake is more related to Wano Ku Ni..) And in Wano arc, there will be a zoan war.. I hope that Gin will be one among that..

ii) Marco the Pheonix - We knew that Nekomamushi, Inuarashi and Momonosuke along with Zunisha were in search of Marco the pheonix.. I think Nekomamushi know the exact location of Marco the pheonix.. Luffy need the help of Marco the pheonix to defeat that Kaido..

iii) Shiliew of the rain - I think he somehow got the link to Shogun Warrior in Wano.. His name also derived fromWano.. Maybe he will be there to assist that Shogun Warrior..

iv) Gecko Moriah - He said that Kaido defeated him in the past and he want to build army of zombies in order to attack Kaido.. Maybe Gecko Moriah will be there in Wano to fight back..

v) Killer & Basil Hawkin - We only see Captain Kidd that been captured by Kaido.. For me, I think that Scratchmen Apoo is working under Kaido before he becomes an ally to Kidd, Killer & Basil Hawkin.. Maybe Killer & Basil Hawkin leave Kidd in the fight against Kaido so they will plan to counterattack back.. Maybe when Luffy & Law fight Kaido.. Killer & Basil Hawkin will be there to assist them.. Maybe they will seek for revenge and fight Scratchmen Apoo for betraying them..

vi) Koshiro (Roronoa Zoro's teacher) also somehow linked to Wano. If not him.. Maybe the story of his daughter or may I called daughters (I bet Tashigi & Kuina were twin..) Maybe a tragedy happen there in Wano (in this case, I think that Koshiro is somehow linked to Shogun a.k.a samurai in Wano..) Koshiro runaway with one of her daughter (Kuina) and he think that his wife and other daughter (Tashigi) died in that tragedy.. This is just my prediction on Koshiro.. Will Oda let Koshiro back to Wano and meets Tashigi (hope Tashigi and Vice Admiral Smoker will be there in wano)..

vii) Admiral Green Bull might has his 1st appearance in Wano.. Like I said earlier, Wano will be the battlefield of Zoan & few Paramecia.. Mostly Zoan are come from Kaido & his army.. So Green Bull will also participate in that war (especially someone in Wano will be the spy and bring the information to Admiral Green Bull so that he can make the move.. (Other theory out there about Admiral Green Bull is someone that maybe got link with Wano.. What if that Admiral Green Bull is Kuina..?)

Plus, I bet that we can learn about Ryuma and Jigoro of the wind there in Wano Ku Ni soon..

What you guys think of this..?
Please share your opinion and thought here so that we gain more knowledge on upcoming arc so called as Kaido arc or Wano arc.. ^^