: Well all the leaked info I remember is basically in the plot of Eternal now,
: though I had to add some extra to fill in the gaps that I didn't know. But
: in an old, pre-Microsoft version of the Halo story, Master Chief was the
: player-character from Marathon, the Covenant were the remainder of the
: Pfhor empire after its sacking by the combined Human and S'pht'Kr fleets,
: the Forerunners were the Jjaro and, as in Eternal, they were human (though
: the exact mechanism of how a human spacefaring civilization existed prior
: to when we think human life evolved on Earth was not revealed to me, so
: the time-travel part of that plot point was made up by me for Eternal).
: The rest of the details of Forerunner/Jjaro history and the plot of the
: game were, as far as I'm aware / can recall, the same, as was the nature
: of the Covenant/Pfhor having stolen most of their technology from the
: Forerunners/Jjaro.
: The events of Eternal chapter 5 were originally supposed to be the events of
: the first firing of Halo, and the time-travel plot there was my
: explanation for why 343GS thinks he recognizes Master Chief personally,
: and thinks he's already fired Halo before, aeons ago: they've met, and he
: has.
I think the old Bungie team would be proud of Eternal and how it was partially inspired by Alpha Halo. (the build of the first game, not the fourth ring)
That and the fact it's the most canon of the mods I've seen, was one reason why I thought that Bungie should include it (with your permission obviously) as a free expansion to the Marathon Trilogy Anniversary.
It's like the Missing Information mod for Half Life 2 but without Valve's concerns over it's developemnt: Waste not, want not.