The December issue of Shonen Gangan released on Friday (November 12) and revealed that the Fullmetal Alchemist creator Hiromu Arakawa’s new manga Yomi no Tsugai will begin on December 10. The magazine has a preview illustration. In the January issue of Shonen Gangan, Yomi no Tsugai will be on the cover.
No idea what's going on with the Arslan adaptation she's been doing since 2013… but she was able to do that and Silver Spoon at the same time so I guess there's no real issue..