We've seen how Bungie has given away key Halo artifacts such as the Star and Bungie nameplates. Blue flames too.
They are leaving Halo, they're giving it away. But not to 343, they are giving it to the fans.
From the recent behaviour Bungie has had about nameplates and such, I have no doubt that they will explain all the mysteries we could never solve. It looks like they don't care about 343, they're not going to leave them anything.
They're probably going to explain everything on Bungie day, or a bit before it. We have to solve things now. Time is running out.
Realize that the Bungie/343 departure as I've talked about in this post is speculation. It could not be true, but it's what I believe, and it makes sense.