"That could be a number of places, though. And you never know with Nygma. He could be anywhere now, even right in the open."
Nygma
And that's exactly where Nygma was, right in the open. Specifically, the bustling, crowded Castle Town market. He now wore commoner clothes, to blend in, but still wore his signature green. He also donned a bowler hat atop his head, with a question mark insignia stitched onto the front of it. He seemed to be minding his own business, and apparently walked alone and unprotected, at that, milling about the market, shopping for fresh goods.