2. The Bat Family
In Arkham Asylum we were introduced to Oracle (Barbara Gordon) and to her father, Jim Gordon. They are both big characters in the Batman comics and important allies to The Bat. In Arkham City we met Nightwing and Robin, who are arguably the most important characters in the Bat-Family other than Batman himself. Then there was Alfred Pennyworth, who relayed information to Batman via his cowl walkie-talkie during Arkham City. These characters have been with Batman since the start of his crime-fighting career. Most of these characters have just been introduced to the Arkham series and have yet to be built upon, which is exactly where the problem starts. I think that the gamers have not been properly acquainted with these characters yet. Bringing more characters into the game would put down from the importance of Batman's newly introduced allies.