http://www.ign.com/articles/2014/05/30/red-dead-redemption-2-looks-more-likely-than-ever
Red Dead Redemption 2 is bound to happen sooner or later, with Take-Two CEO Strauss Zelnick branding the original game as part of a "permanent franchise".
At the Cowen and Company Analyst conference (via Gamespot), Zelnick explained that both Red Dead and BioShock were likely to get new entries in future, though he stressed the publisher's commitment to launching a new series on a yearly basis.
"I pretty much know the ones that I can assure you are permanent," he said. "It's obvious that GTA is a permanent franchise as long as we keep delivering this incredible quality; it seems quite obvious that Red Dead is a permanent franchise, again with the same caveat, or Borderlands, for example, and NBA and others.
"We haven't given any colour on how you should think about [BioShock] yet except we do believe it's beloved; we think it's important [and] certainly something that we're focused on; something 2K Marin will be responsible for shepherding going forward," he continued. "I think there's a lot of upside in that franchise. It hasn't necessarily been realised yet."
While it's not surprising to hear that a new studio has been handled development duties following the collapse of Irrational, it's slightly odd that 2K Marin has been pegged for the role. Though it developed BioShock 2, the release of The Bureau: XCOM Declassified wasn't as well received as it hoped, which led to pretty major layoffs.