Ok so I'm new to forum posts
But down to business what I would like to discus what we know "so far" about the story of Halo 4
Here is what I know
#1 The "Planet" is not a natural formation , more than likely ,Forruner, in origin
#2 IT'S NOT ONYX ( the reason I say this is because I believe they are still in a proximity to Instilation 00 (Aka the ark) and if guilty spark was correct they are or rather "were" 2^18 light years from galactic center and Onyx was inside UNSC territory. so off the bat that hypothesis is wrong.)
And finally #3 Cortana is getting close to the end of her AI life span
If anyone has anything to add please do so