During all the tournaments and chaos of Quakecon 2012 co-founder of id Software John Carmack confirmed to the public that the company has closed its mobile operations to focus on Doom 4. This announcement came from his keynote speech at this years convention and he stated in the speech "We did make the decision to close up our mobile development, which saddens me a lot, in that I love doing the mobile work, but we had some developers on there that we wanted to bring on to the Doom 4 project."
Carmack later revealed that they are sitting on an iOS project, but has since then given no details regarding the project he referenced. No news was also given from id regarding a release date for Doom 4 or when they plan to have the game finished, John Carmack stated that the project "will be done when it's done" he also stated that "every decade there will be a new Doom, but hopefully we can do better than that."
All this news about Doom 4 is fantastic considering the last entry into the franchise with Doom 3 was released back in August of 2004. Hopefully we will be getting some more news regarding Doom 4 in the near future, but knowing Carmack and id they won't be showing or announcing anything about their game until it's set to liking. id has been very known for having a long development time between games, but the pay off for id and gamer's has always been through the roof!