A year and a half later, however, Hangar 13 is a far different place. This past year was a turbulent time for the studio, as it floundered while trying to figure out what its next game would be. Many of the people who helped make Mafia III are now gone, including the game's art director, technical art director, senior producers, design director, many design leads, and a number of other key staff. Some left voluntarily; others were let go or asked to move. Some went to other game companies; others moved to the top-secret studio next door to work on an unannounced new BioShock game.
Kotaku also wrote:
In the midst of all this confusion, some employees of Hangar 13 couldn't help but look with envy at their neighbors. Next door, a small group of people were working on a project code-named Parkside, quietly recruiting from across the video game industry for a game so secret, they wouldn't even tell their colleagues at Hangar 13 about it. Word got out, though, that it was in fact a new game in one of the most interesting shooter franchises of the past decade: BioShock.
"If anyone from Hangar 13 tried to strike up a conversation with them, they'd say, 'Oh, we can't really talk about it,'" said one person familiar with the studio. "It was all very tight-lipped."
Now that Ken Levine, the creator of BioShock series, is no longer behind the helm, it's going to be interested to see the story and direction of the upcoming BioShock title. The top-secret 2K studio that is allegedly working on the game is located next to the Hangar 13 studio in Novato, California. If you so happen to live in Novato, would you mind going down to the studio and ask them if the rumor is true?
Source : TechPowerUp