- last post: 01.01.0001 12:00 AM PDT
I shall only say this once, and I hope it will be enough. One, the Cortana letters are not cannon. They are not cannon. They existed to promote Bungie's new game and get the old fanbase interested. Nothing more and nothing less. Don't read to much into them, since they don't apply to the story in any meaningful way. Simply a promotional stunt.
Second: Halo and Marathon are not set in the same universe, nor do their stories intersect. There are similarities, but only vague ones that can be concluded do to the fact that it is Bungie's style to have themes to all their games, and these concuring themes overlap. Think of the number seven, etc. It has nothing to do with plot.
Thirdly, and lastly, to base such an idea simply on a statement Cortana made about there being a good AI fighting back is ludicruous to the extreme. There is no evidence for your position that can prove it, but there is lots, and by lots I mean mountains and piles and worlds, of cirumstantial and solid evidance to disprove it. In Halo there is no Durandal, there is no rampacny, and there is no Marathon.