Activision and Treyarch appear to be setting up a playtest session dated for May 29 and May 30 for Call of Duty: Black Ops 2. The purpose of the playtest session is presumably to elicit feedback from gamers about the state of the game and each session is expected to last 2.5 hours. For users' participation, they will each receive $60.
The full details of the playtest can be seen in the image below, although they do not appear to specify exactly what players will be playtesting—aside from the game itself, that is.
The playtest was revealed by Jayzik on the Call of Duty: Black Ops 2 subreddit on Reddit. He appears to be subscribed to something called VGMarket, a marketing firm that specializes in the video game industry, providing services for companies like Activision.