Shawn115

Could serve the same purpose. It definitely appears Forerunner, so how could that tie into the story? While the death of the Ur-Didact is a bit underwhelming let's just assume he is gone. So what part would Forerunners even have left to play? Like I mentioned before the books leave the fate of the Iso-Didact, the Ur-Didact's top general, the new Life Shaper, and a handful of life-workers open. That's the only connection I could draw from what little we see in that trailer.

War Sphinxes defended the Ur-Didact's cryptum in the novels. And according to the final book of the Forerunner trilogy it basically implies the Iso-Didact (Bornstellar) is still alive somewhere. Could be a very different twist as the Ur-Didact in Halo 4 was mad while his duplicate was still very much in line with the Librarian.

I'm pretty new to the whole back story fiction to Halo but the symbol shown at the end is pretty universally known as the sign of the Didact. It appears in the 343 Halo Anniversary Edition during the Guilty Spark cut scenes when he speaks specifically of the Didact. The "planet" in the Halo 4 E3 demo is pretty obviously a shield world built to survive the firing of the rings and it's already been confirmed the enemy you're fighting are Prometheans. While I'm not genius I can put clues together. Just beyond the Ark built by the Forerunners they also built a shield world that holds what remains of their species. Since the Didact (sort of) survived via imprint and made it to the Ark 2+2 to me adds up to him running the show, and he still doesn't like Humans. Guilty Spark also makes mention in the Anniversary cut scenes that the Librarian is no longer there to "temper his rage". I guess we will find out what happened to her.