I work at best buy and we get a lot of microsoft employees coming by and I happen to ring up one of the Xbox Team. I was like "alright cut the crap... I heard all the rumors, will there be a Halo 2 Anniversary? he said "I can't say anything haha but I can say Halo 2 was everyone's favorite multiplayer shooter" Well...he didn't deny it and he pretty much gave me a hint.
I did the same thing to Valve employees. I asked them if L4D3 is happening. Obviously they game me the "I can't say anything"