"Seems so close to the Halo 1 Anniversary. Give it a year then sure"? Umm, that would be an 11-year anniversary, and that wouldn't make a whole lot of sense.
As for me personally, I think they'll release H2A and Halo 5 simultaneously. Halo 5 has been confirmed to be a 2014 game, and there has been SO much build-up towards H2A, and not making it would only disappoint the fans for building up something that didn't happen.