The World of Magic New Map Sky Castle

It's what we've all been waiting for! An expansion to the world of magic! Sky Castle ~

It appears that there will be new monsters for players to train on (starting from level 26), with a new mob 2 levels higher than Sandeaters. More information

Official Announcement
 
Speculations

• Release date: Probably during the winter vacation, based on the two pictures released
• Map design: Sky castle will be connected to the empty exits on both factions. Each faction will have its own first few maps (like the desert) and will converge to a map shared by both factions (like hot sand plains)
• New bosses: It's almost a given that there will be new bosses
• New items: Possibly new equipment 
• New skillbooks: Many of the skillbooks cannot be obtained in game, perhaps this new map will have monsters that drop these skillbooks.