Batman: Arkham City
|Batman: Arkham City
This game has a prerelease article
Batman: Arkham City is the followup to Arkham Asylum. The inmates have now taken over a portion of Gotham City, and Batman heads in there to make things right.
These character trophies were either edited or cut before the final release. A video covering them can be found here.
It seems originally Clayface was meant to impersonate Talia, just like he does with Joker, Gordon, etc. While this was cut from the final game, all of the textures for such are left in the files.
A variation of Clayface's icon in Arkham City was found in the files.
Another cut enemy, a second Clayface henchman, also didn't make it into the final game.
In the Wayne Manor Challenge Map, behind an inaccessible wall outside the map, a staircase and a small room can be found. This looks like an unfinished section, so perhaps developers just didn't want to continue expanding the map. This is highly likely, as the staircase also appears in the Community Challenge Pack in Arkham Knight.
According to the credits, Nightwing is voiced by Quinton Flynn. However, he has no lines in the game, which could mean he was supposed to have a larger role.
Some parts of the E3 demo area for the Wii U release have been made partially playable. Gameplay footage can be found here.
Joker was originally going to be a playable character, but wasn't in the final game for unknown reasons. Proof of this can be found in Return to Arkham City's files, as it uses an older version of City as a base, and in Batman: Gangland (the unofficial precursor to Arkham Origins Online) which contains assets from this game's Joker. Gameplay footage of him (restored by modding) can be found here.
While no story elements are present, it appears Joker would've functioned merely as another challenge map exclusive like Robin and Nightwing.