According to Japanese blog
Hachima (translated via
Siliconera), the latest issue of Famitsu noted that the expansion will contain new weapons, magic, and a PvP-exclusive map called Immortal Competition.
The magazine included a picture of a snowy area, though it's unclear if this is Immortal Competition or a new single-player level.
New weapons include a great sword with a colourless flame, while spells include a boomerang made of light and an ice storm attack.