In a recent interview North didn’t confirm the development of a 3rd title in the franchise but asked an honest question to his interviewer regarding the prospect of a 3rd Uncharted title. He said of the matter:
"I'm not supposed to talk about [a third game]. I've been told I can't say one way or another. But I will ask a question back: Do you think it would be financially responsible of Sony to not make a third game that has made hundreds of millions of dollars for their company?"At least he gave the interviewer something to work with. See it as an unofficial confirmation that Uncharted 3 is coming but with new multiplayer DLC being released for Uncharted 2 today I’d imagine e won’t hear anything about this until year’s end at the earliest. Again, time will tell.
"You've just got to use your common sense. What do you think? I'm not supposed to say one way or the other. I would encourage everyone to tap into their common sense."