Ok so what i was doing was playing every halo in order and when i played halo 3 on legendary again i saw something in the legendary ending. The first time i saw it i had know idea what it was but now that i watched the halo 4 trailer i think i know what it is. Ok so at the end of the legendary ending it shows the Foward unto dawn moving in space and then you see a blue outline of a planet then the planet rotates and you can see a blue circle in the middle of the planet. Like i said before i had know idea what it was then but now i do now. Its The shild world planet thing from the halo 4 trailer. Look at it yourself http://www.youtube.com/watch?v=Yygn_vlH5a4. Go to 7:25 and look at it and tell me what you think.
It was already known that whatever happens in Halo 4 would be related to that planet… and that it was the same from the teaser as well.
i know but i forgot about that planet in the halo 3 legendary ending
REVIVAL OF THE FORERUNNERS