Blackbeard

After the events of Wano wrapped up, Blackbeard, the Yonko, engaged in combat against Trafalgar Law, one of the members of the Worst Generation just like him, on a sea in the New World.

Barrie also says Hook worked for Blackbeard and was the only man Long John Silver was afraid of.

Blackbeard is the perfect final "antagonist" for Luffy, but Shanks will still have a part to play as a final obstacle, with the form of their conflict likely being a Davy Back Fight.

Blackbeard's involvement in the Wano Country arc was kept to a minimum by Oda, which was a smart decision considering there were already two Yonko involved in the arc.

Blackbeard's plan came as a shock not just to the people gathered in the room but also to the viewers.

Blackbeard was also revealed to be on a hunt for powerful Devil Fruits and his crew has acquired tremendous abilities that have been revealed to the fans one after the other in the current arc.

During his adventures, he meets notorious pirate Blackbeard, and the two fall in love and decide to pursue a relationship.

During his invasion of the pirate Island, Garp was faced with several Titanic Captains of the Blackbeard Pirates, which also included the former Admiral of the Marines, Kuzan.

Following the timeskip, he's now associated with the Blackbeard Pirates, who are likely planning to use Aokiji's Devil Fruit, the Ice-Ice Fruit, for a variety of dastardly plans.

He bypasses the higher-ups' instructions and heads straight toward Blackbeard's territory.

He committed such heinous crimes that he was given a life sentence at Impel Down, and he joined Blackbeard after being freed from the underwater prison.

It was made known that after the death of Whitebeard, Blackbeard started taking over the territories that the former had under him.

Jinbe and Blackbeard step down as Warlords of the Sea during this arc, but the biggest development has to be each Straw Hat Pirates' plan for the time skip.

Kuzan told him that he did not think of himself as a pirate and that he would never join them, however, Blackbeard told him that they only need to have similar interests as pirates and not necessarily get along well.

Luffy runs into all sorts of nasty pirates who want to do him harm, including Blackbeard himself.

Making use of techniques such as awakened amputation as well as Shock Wille, Law did tremendous amounts of damage to Blackbeard.

More importantly, it was also revealed that the Blackbeard Pirates were now hunting for powerful Devil Fruits.

Of course, Garp is also a user of the Color of the Supreme King and he demonstrated its usage recently in when he fought against the Blackbeard Pirates on the Pirate Island.

Originally, Shiryu didn't have a Devil Fruit, but he received one after the Blackbeard Pirates killed Absalom.

Pizzaro joined the Blackbeard Pirates after surviving an intense brawl inside Impel Down, which suggests that he is a strong individual.