Like I said, not upcoming in Reach. If any of this is true, the helmet has already been in the game. I was stating that it wouldn't be upcoming in Reach, meaning it won't be added, nor has it been added. If you're going to point to this topic, it means that the helmet was already in the game since its release. From what I have heard, it would require people to redownload every single map if they were to add in ANY new armour, which could take up gigabytes on a person's hard drive. So it's possible, but not really feasible.
EDIT: All that the OP said in that topic is purely just rumour/speculation.