Manga creator Nobuhiro Watsuki will be resuming his Rurouni Kenshin series for a brief run starting in the June issue of Shueisha's Jump Square magazine, which will ship on May 2, 2012. The magazine's advertising describes the samurai manga's return as a "reboot," although the magazine may not be using the term with the English denotation in mind. More details will be in upcoming issues of Jump Square.
In the meantime, Watsuki is putting his current manga series, Embalming - The Another Tale of Frankenstein, on hiatus as of the March issue of Jump Square magazine, which will ship in February. Embalming will return in the fall.