TOMORROW
The picture included in that tweet looks like it's in-game. HYPE HYPE HYPE
Fresh off the presses:
Batman: Arkham Origins coming to current gen consoles and Wii U October 2013.
The game is developed by WB Games Montreal (they made the Wii U version of Arkham City) and the story takes place before the previous two games. Here's some info about the plot and the game:
There will also be a handheld spin-off game called Batman: Arkham Origins Blackgate released on the same day.