Cosmic Book News have stated the Batman reboot, thought to be titled "The Batman", could be based on the Arkham games. The site has claimed to have sources close to WB and have in the past posted several rumors around WB's plans on the DC shared universe.
They also say that WB are currently leaning towards a fresh reboot of Green Lantern with a new actor playing Hal Jordan.
It is unknown how reliable this source is, however a Batman based on Rocksteady's Arkham games could provide a perfect blend between the dark and serious tones of Nolan's Dark Knight Trilogy and the fantastical aspects needed for a shared DC universe.
The Arkham games are considered huge successes, with Arkham City winning game of the year in 2011 and Arkham Asylum receiving no less than a 9/10 in all major reviews. Using this Batman could prove to be a good move for DC as it is an incarnation of the character which a lot of people are aware of and would require less development in a Justice League movie. What do you think?