Alrirght, so we know Halo 3 Anniversary is not happening. It's a fact.
Actually, it is not a fact. 343i made a similar comment about H2A and, imagine my shock, there's a H2A. Also, does "OMG stop. There is no H3A" not sound like an odd way to refute it's development? If that's even a remotely genuine response, it's an ignorant one, to say the least.
343i has lied to us many times. That
is a fact. From a marketing standpoint, it wouldn't make sense to reveal that a highly anticipated game is in the works. Would that not ruin the surprise?