There have been no confirmed developments or indications in the "One Piece" series suggesting that Roronoa Zoro will obtain a new sword specifically in the Wano Country arc. However, it's important to note that "One Piece" is an ongoing series, and new story developments may have occurred beyond my knowledge cutoff.

Throughout the series, Zoro has demonstrated a strong affinity for swords and has acquired powerful blades to enhance his swordsmanship. If Zoro were to acquire a new sword in the Wano Country arc or any future arc, it would likely be a significant event within the story.

To find out if Zoro obtains a new sword or any other significant events in the series, it is recommended to continue following the manga or anime.