There aren't many details about Aaron Guzikowski's script, but here's the official synopsis so far: "After his 6-year-old daughter and her friend are kidnapped, a small-town carpenter butts heads with a young, brash detective in charge of the investigation. The father is a Bible-reading, deer-hunting survivalist. The cop, meanwhile, can't wait to get to the city. Feeling failed by the law, the father captures the man he believes responsible and begins to torture him in a desperate attempt to find out what he did with the girls, whom he's convinced are still alive." When Wahlberg first signed on, there was no mention of his role in the film, but I'd like to play fantasy casting director if I may and suggest Bale as the bible-thumping survivalist and Wahlberg as the cop?
It's not going to be easy to get Prisoners into gear since so far no one (other than Wahlberg) has been officially confirmed, and that includes Bryan Singer as director. According to Biz, "Endeavour is putting together the package and plans on shopping it after a director is officially attached, with insiders stressing the project isn't financed and saying the Wahlberg-Bale combo is fragile. This one's all about making the numbers work for the players, who typically command hefty paydays." Hopefully, that big blank spot in Bale's schedule following Killing Pablo will keep him free for Prisoners...then again, maybe the guy is due for a break.
Since nothing is official yet, stay tuned to Cinematical for the official word.