The Fandom Post is reporting that FUNimation Entertainment will be releasing the English dub of Episodes 629-641 of One Piece digitally on December 1, 2020. The episodes will then be available for streaming on FunimationNow on December 22, 2020.
This batch of episodes will be released on home video on January 5, 2021.
The story for these episodes of One Piece is described as:
The Straw Hats help a tiny stowaway, but the mission turns into an all-out brawl of gigantic proportions. Then, when a distress signal draws half the crew to an island engulfed in flames, Luffy comes across the walking, talking, bottom half of a samurai. Meanwhile, the rest of the gang gets caught in a lab, but their escape is foiled when they stumble upon a room full of quarantined children.
Source: The Fandom Post