I have no pictures or proof, but my brother works at Costco and the manager of the phone kiosk showed him on the computer that verizon is releasing the gs3 on the 28th. That seems to match some other sources floating around. I tried to get him to take a picture but he didn't want to get in trouble. They are supposed to be getting them for other carriers on the 23rd.
Since I'm only 6 months into my contract, the manager said I can come in and add a line, then just put a dumb phone on it and cancel the data plan. Gonna dual wield it with my nexus. Then pass it on to my wife when the next nexus comes out and sell both her nexus and mine.