What Happens When Gotham City is Over-run by Arkham Inmates?

Who: Katniss Everdeen, River Tam, &OPEN
What: Just a dream, right?
When: January 1st 2012
Where: Arkham Asylum; Walker's private block cell.
Rating: TBD
Status: Open, Incomplete [Mockingjay Spoilers! ]

( A sliding of metal doors replaced her thoughts of sadness. She shifted, preparing for something awful. )