First of all, there will be at least three different story expansions released within the first six months after the game launches. The first expansion is called Batgirl: A Matter of Family, which will be set before the events of the main game, and take place in an entirely new location not featured in Batman: Arkham Knight. This add-on marks the first time that players have been able to control Batgirl in any capacity in the Arkham games.
The second story expansion is called The Season of Infamy, and this add-on will star the Caped Crusader himself in a new adventure. This particular expansion will revolve around a group of “legendary super-villains” invading Gotham. Besides the new missions that will be added to tell this new story arc, players can also expect The Season of Infamy to bring brand new gameplay mechanics to the table as well, though what those gameplay mechanics are exactly have yet to be revealed.
Gotham City Stories is the third and final story add-on that will be included in the Season Pass for Batman: Arkham Knight. Gotham City Stories is said to center around “Batman’s key allies”, which will likely mean Catwoman, Nightwing, and Robin, as they are the other “playable” characters in the game. Gotham City Stories will take place simultaneously during and after the events of Batman: Arkham Knight.
Besides story add-ons, other content is being added as well in the Season Pass. Fans can look forward to themed race tracks and Batmobiles based on Batman properties throughout the 75-year existence of the character.
In addition to the previously discussed content, the season pass will also gift players with new Crimefighter Challenge maps. Challenge maps have been a staple of the series since the beginning, and the news challenge maps will be playable by Batman as well as the other playable characters.