Take-Two Interactive head Strauss Zelnick dropped a substantial hint that Bioshock would be part of a trilogy - at the least.
In a conference call with investors and analysts, Zelnick responded to a question about the time frame for the release of previously-announced movie tied in with the game.
"It's unlikely that the picture would be released to coincide with Bioshock 2," he said. "It would be more likely that it would be released coincidentally with Bioshock 3. That also remains to be seen."
Zelnick also said the franchise was key to his company and that "roughly an every-three-year [release] schedule would be optimal."
The first-person shooter, which featured role-playing game elements and a storyline depicting an Ayn Rand-inspired underwater world gone awry, was first released on the Xbox 360 and later on the PC. A PlayStation 3 version was also recently announced.
Bioshock 2 is slated for a 2009 fall release.