Hi, just wanted to post this because I recently read the Gregg Bear Forerunner Saga “Cryptum” and “Primordium”.
Using information gathered from these books, halo 3, CE Aniversary terminals and trailers, I now have a pretty solid theory on the plot of Halo 4. Possible SPOILER ALERT!!!
In the last few pages of Halo: Primordium, the narator is revealed to be 343 Guilty Spark. The dates are redacted, but a few things are certain;
- The UNSC ship has pulled in his “Wreckage”. Since GS is dead, this info comes post halo 3.
- GS states “Some may say she is dead, that she died on Earth. But this is demonstrably untrue.” The “She” he is referring to is the Librarian, wife of the diadact, who’s forerunner symbol can be seen upon the monitors of the scanned parts of the UNSC Infinity during the Halo 4 Live Action trailer.
- Humans at this point in time are “facing” the didact. This is also stated by GS earlier in the book.
- GS knows the location of the Librarian. “I know where to find her.”
- Information about “Halo: Silentium” shows that the Ur-Didact could possibly have become infected by the flood.
- The human commander states “Arks, there’s more of them”, as humanity didn’t even know that 1 Ark existed Pre-Halo 3, more information to say this information comes Post-halo 3.
- In Halo: Glasslands, Halsey escapes Onyx with some of Spartan blue team and is returned to Earth.
With this information, I can conclude that:
The Didact doesn’t know his wife is still alive. The Didact may be infected. 343 GS has survived Halo 3 through the salvaging by the UNSC of his long lost pre-monitor memories. 343 GS is searching for the Librarian and knows more about her whereabouts than the Didact. The Didact is at war with humanity.
S-117 and Cortana land on Requiem, wake the Didact, whom blames humanity for the “death” of his wife. He is angry and goes to war with humanity using the AI Promethean armadas. Cortana goes Rampant (obviously).
S-117 and Cortana (De-activated?) return to Earth, where they find out Halsey and the majority of Spartan Blue team are alive. Halsey Repairs Cortana? 343 GS finds the Librarian who talks sense into the Didact. (Pre-)Precursor enemy arrives?
Discovery of other Arks?
Forerunner-Human alliance defeats ancient enemy. Death of the Chief?