I think that after the huge war against the WG all Strawhats will get a chapter or two devoted to them to complete their dream:
- Zoro vs Mihawk
- Sanji finding All Blue
- Ussop going to Elbaff and being seen as a great adventurer
etc.
So I don't think we will go to Elbaf after Egghead.
The huge event at Egghead + Morgans revealing the truth about Imu will make it clear to the World the WG is evil.
The huge war against the WG will start after Eggehad, but the Strawhats will not fight in the war until going to Laugh Tale.
So the way I see the story going is:
- Events at Eggead (York and Seraphims are defeated)
- Marine Fleet attack the Strawhats while they leave Egghead, huge battle with the Strawhat Grand Fleet coming in to help them
- Vegapunk and the remaining Punks leave to Elbaf with Bonney, Vegapunk says where to find the last Road Poneglyph (or the man with the scar)
- We now get hints of the War starting, but we will stay with the Strawhats
- They will find the last Road Poneglyph and we get some chapters with an update on the War
- The Strawhats go to Laugh Tale, final fight against BB, Shanks is included aswell
- They find the One Piece, but it's not revealed to the reader
- We return to the War and the WG is winning, the Strawhats show up just in time to turn the tides and the WG is defeated
- Now we get to all the Strawhats completing their dream with the final chapter of the series being the reveal of the One Piece
The END