Well folks, I want to put the stake in the heart of this right now. The following events have just taken place in the ARG, coordinating with the Narrow's Attack from BB. With the Narrow's attack as a start off point, the following items must occur in linear sequence:
1. The Gotham Times (Volume 1) prints a story on Thanksgiving (Nov. 23) claiming that a report on the "institutional breakdown" at Arkham Asylum was already three weeks old.
2. In the same newspaper, a story about Frederick Alder, would-be carjacker is run, detailing not only his activities, but also his later whereabouts.
3. The joker leads his clowns to the Evidence Vault of Precinct 12, where, after intense problem solving they unlock the location and reclaim the personal effects of Frederick Alder, including the GUSD ID of one Jake Karnassian.
4. The GUSD website notes to important details: 1) Jake Karnassian is reported "on hiatus" as of 11/30, 2) that recent events in the Narrow's have closed down bus service in District 22.
5. After the caper, Joker escapes in a bus marked District 22, obviously a signal that the activities of Frederick Alder aided the Joker in planning and executing the bank robbery.
If the Gotham Times had not come out, then we would have no way of calculating the timing of the Robbery. Clearly the robbery happened in real time with the ARG, having included Joker's clowns as part of the planning and preparation for the heist.
What was that original crime from BB? I believe that it may have been a dress rehearsal, wouldn't that be very Joker-esque?