Rainbow 6: Patriots is "still cooking," according to Ubisoft executive director Alain Corre.
Speaking with IGN at Gamescom this week, Corre said Ubisoft will bring the game out when it is ready, though no timetable was disclosed.
"It's an important franchise for Ubisoft. We want to make sure, on this one, like all the other games we're working on, that we bring it when we feel it's perfect," he said.
Asked if the game would continue to be called Rainbow 6: Patriots, Corre wouldn't commit.
"We can't say yet. We're iterating," he said. "What we want is to have a compelling story. We want people who play the next Rainbow 6 to be astonished, to be very pleased with what they see. You've seen that the improvement in games over the last few years has been exponential. We have to reflect that improvement in quality. That's what we're doing on all our games."
Corre added that Ubisoft's goal for the project is to show it again when it has enough creativity and innovation to make it "something worth waiting for." This doesn't happen on the same timetable for all games, he said.
"On some games, it happens more often. Creation is not an exact science," Corre said. "When we're happy with what we see, when we think we can bring something new to gamers, then we say, 'Okay, this is a good time to release it.'"
During E3 in June, Ubisoft confirmed that Rainbow 6: Patriots had moved to next-generation consoles. This was after Ubisoft Montreal CEO Yannis Mallat told a group of media that the game "has a place in the studio," but would not say more.
Rainbow 6: Patriots was announced in 2011 and was originally expected to launch in 2013 for the Xbox 360, PlayStation 3, and PC.
Developed by Ubisoft Montreal with assistance from Ubisoft Toronto and Red Storm, Rainbow 6: Patriots will follow the counterterrorism Team Rainbow squad as it tries to put down a group of American insurgents known as the True Patriots. As players look to suppress the True Patriots' budding revolution, they will be faced with "tough ethical decisions," according to Ubisoft.