Yeah, I have no idea either.

GungHo Online Entertainment, Inc., a multiplatform publisher for the online gaming community, today announced the return of Batman to the highly successful mobile title Puzzle & Dragons with a collaboration event that now includes characters from Warner Bros. Interactive Entertainment's Batman: Arkham Knight. From Sept. 7-20, players can enjoy a host of Batman-related content, including new characters pulled straight from one of 2015's most celebrated video games.

This updated crossover event includes The Scarecrow and The Arkham Knight as depicted in Batman: Arkham Knight. Many characters from previous Batman collaborations have also been improved, and the Batman Collab Egg Machine now features six special characters in total - including a new version of Harley Quinn. Additional features include:
• New original music
• New Gotham City background
• Five difficulty levels, including Mythical-level difficulty
• Two new Ultimate Evolutions for previous Batman collaboration monsters
• New "swoop down" animation - evocative of Batman gliding on his cape - when players enter the dungeon

Featuring an addictive combination of puzzle solving, dungeon crawling, and monster collecting, Puzzle & Dragons is a mobile gaming phenomenon that continues to see tremendous growth. In the game, players capture, collect, and evolve hundreds of elemental monsters while using quick thinking to chain combos and maximize the abilities and skills of their monsters. Puzzle & Dragons may be downloaded from the App Store, Google Play, and Amazon Appstore.