Possible First Set Photo From Dark Knight Rises?

NolanFans (via JoBlo Forums) has posted what could be the first set image from The Dark Knight Rises. The film is expected to start production in March-April and it's possible sets have already been constructed at Pinewood Studios in London. If this a true set piece and not some picture of the original set from Batman Begins we could be seeing a return to Arkham Asylum. What fuels this further is that there have been rumblings of Nolan trying to get shots of New York City streets covered in snow before it melts and has already begun production on his own.