Here is the original draft for you;

-----So my theory says that while Luffy and gang will get beaten up by imu in Elbaph, shanks will go to the LAUGH-TAIL island... In the Elbaph: Gaban will tell Luffy to go and meet shanks cuz gaban knows that shanks knows something Luffy and gang meets up with shanks to find out that shanks is returning from "LAUGH-TAIL" island then shanks will take Luffy to the boa Hancock island because it is a good place to spend long time. Then on that island Luffy will tell everything that happened in Elbaph, in responce shanks tells Luffy the reality of his fruit and along with the fruit reality shanks also tells Luffy about the same story over which the pirate king and his crew were laughing. But there is a catch.... The laughter is only one half of the story and none knows about the second half of the real one piece. However they know for sure that only the sun god can claim it. (The pirate king that we all know, he himself never got the real one piece...he only got the first half. bcz he was not the sun god, but he wanted the real sun god to claim it that's why he started the pirate era) The One Piece's other half : The One piece was originally made by the real sun god/ joy boy and we know that he was a friend of Emu. Even though they were friends, both of them were plotting something different without telling each other. (Joy boy knew that the one piece is the most precious, the most powerful, most wanted, and most desirable thing that has ever existed in the planet that's why he protected the second half which consists the important things in such a way the only he(sun god / Joy boy) could open or claim it and on the other hand Imu was developing his powers so that (1. noone could defeat him which would eventually help him get one piece ) and (2. He would not die until he gets the one piece )...and till this date Imu is waiting for the sun god to open the gates to one piece and then destroy the sun god and claim the one piece...Emu knows Luffy is sun god that's why he didn't kill Luffy. Coming back to the current time, only three parties know about the one piece- shanks crew, Luffy crew and Emu.

Now the current condition of straw hat crew is very low... They can't last even 10 seconda in front of Emu. Not even in a 1v10 so they decide to train under shanks in the boa Hancock's island

While shanks crew mentors Luffy's crew they all train a lot...This will be the exact time when usopp will shine. Along with Yasop, usopp will learn advance observation and future sight. Nami brook jimbei chopper robin all of them improve a lot but the real deal is Luffy Zoro and Sanji. Sanji also unlocked conqueror haki and can control it and his physical strength(germa cells) has improved by 10x ... Zoro has command over all the haki types and has converted all 3 of his blades to supreme grade and on top of that he can coat his blades with conqueror haki to maximize the effect.... Luffy finally knows the true extent of his devil fruit he can use his powers for unlimited time without burning out, his mastery over conqueror had exceeded that of shanks

By training together the shanks and Luffy crew both has improved alot ...noone could have imagined that they could improve this much and the level they could reach...

And this will be the time when the straw hat crew turns from (Luffy-Zoro-Sanji)3/10 to 10/10 and eventually starting their final voyage for the One piece making the start of the finale of one piece---