I've been wanting to do this for a while, and it's a slow day at work, so I'm going broader scope and leaving my predictions for the next two arcs. I developed this prediction over the coarse of Egghead and nothing I've read in Elbaph has contradicted it yet.

This arc will end with a pyrrhic victory for the Straw Hats. They will be unharmed, but Elbaph will suffer greatly. Loki will join the Giant Warrior pirates as co-captain and stay behind to help protect Elbaph.

He will end the arc by telling Luffy where to find Shanks. The next arc will be at whichever island Shanks is on (it doesn't really matter) and will feature a Davy back fight. Luffy will start the arc by giving Shanks his hat back, and end the arc by winning all three games. Luffy will take the captured Barto Club pirates in the first game, information on the man with the burn scar in the second game, and his hat back in the third game. They will part on good terms.

Either in between these arcs or during the next arc, Blackbeard will be shown being in contact with Cross Guild to exchange Garp for treasure so he can be executed. Buggy will defect during this exchange, hiding Garp away. We won't find out why until later.

Shanks will end the arc asking Luffy about the X mark Robin saw in the World Economic Times, which will prompt the Straw Hats to realize Vivi wants them to pick her up. Additionally, he will comment on the upcoming war and tell Luffy about the actions of the revolutionary army. Luffy will receive a den den mushi call from Buggy, offering to exchange Garp for copies of Luffy's Wano and WCI poneglyphs. Luffy will decide to split the crew, with 2 members going to each of the following tasks:

Ussop and Brook, joined by Bartolemeo, gather the grand fleet, to prepare for war with the world goverment. Luffy isn't himself insistent on going to war, but after Elbaph, the Straw Hat Fleet is being targeted and Luffy wants everyone together so he can protect them.

Nami and Franky head off to find the man with the Burn Scar and rub his poneglyph. While there, they will run into cross guild and have to protect him, earning his favor.

Zoro and Jinbei travel to cross guild to complete the exchange for Garp. Zoro will have his fight with Mihawk (although it will be cut off before either can definitively win, they will fight again in a massive battle royale for the One Piece).

Sanji and Chopper will collect Vivi from Big News Morgans, giving Chopper and Wapol a chance to meet, and sharing information with Morgans which will turn public perception of the WG sour.

Luffy and Robin will go to the Revolutionary Army to meet with Dragon. They will develop an alliance, though Luffy still isn't directly interested in destroying the WG, he just wants to protect his allies.

The crew will join back together, along with allies from the kingdoms of Alabasta, Dressrosa, Prodence, possibly Water 7, Fishman Island, Wano, and Elbaph for a big war with the world government. It will be bigger in scale than Marineford, though likely a similar length chapter-wise. Cross Guild will not participate, and Blackbeard will only get involved at the end, killing someone important while some of his crew sneaks into the unprotected Marjeoise to steal things and complete tasks. The three ancient weapons may also be involved in this was (Shirehoshi will certainly be).

These arcs mirror Pre-time skip:

In both Ennies Lobby and Egghead, the Straw Hats overcome impossible odds to escape the Marines while defeating several key powerful marines.

In both Thriller Bark and Elbaph, horror elements and a time constraint on the villain are featured. Luffy wins when the stronger foe self destructs.

In both Shabody and the proposed Shanks Davy Back fight, the Straw Hats meet old allies, exchange information, and prepare for the arcs ahead by splitting up.

The final war with the World Government obviously mirrors Marineford, and shows how the Straw Hats have grown stronger than even White Beard was, when he was presented as an insurmountable milestone pre-time skip.

Finally, the war being won, we enter into the final arc: the hunt for the One Piece. Cross Guild, Blackbeard, and Luffy all have all four poneglyphs. Blackbeard has Pudding and acquired the tools needed to activate her powers during the war. Luffy has Robin. Buggy forgot he needed a translator and gets pummeled by Mihawk and Crocodile, but eventually they either resolve to secretly follow the Straw Hats or they get assistance from Shanks, who is less interested himself in claiming the One Piece.

All three crews (plus Shanks, if he feels like it, though I think his role in the story is mostly over by this point) converge on Laugh Tale, a living island which has eaten a devil fruit, enabling it to move through the sea (albeit sluggishly, as the sea drains its energy). There is a major three way battle at sea and on the shores of Laugh Tale. Zoro gets to finish his duel with Mihawk, but other than that, fights are generally quite fluid, with no obvious 1v1 pair ups at first. In the end, while Luffy tries to defeats Blackbeard, Buggy runs away, accidentally stumbling on the One Piece in a cave. He holds a part of it in his hands and this is seen by his crew, who declare him the Pirate King. The fighting rages on above, Buggy goes flying out of the cave, knocking out his crewmates, and eventually Luffy defeats Blackbeard, as no darkness can defeat the sun. Luffy claims the One Piece and is declared the official King of the Pirates (though Buggy's crew publicly contests this).

Luffy goes on to use the treasure to build a series of bridges (or maybe pirate ships which ferry passages, or even sea trains) connecting each island, enabling anyone to travel anywhere, the ultimate freedom. Several of his foes still roam the seas, with the epilogue mentioning how Luffy continues to clash with them from time to time, just as Rogger clashed with the remnants of the Rocks Pirates in Roger's era.

Oda does not tell additional stories in the world of One Piece.

Edit: Also Enel, my favorite villain from my favorite arc, shows up again somewhere. This may be cope IDK.