By the power of truth, I, while living, have conquered the universe.
Posted by: LoLzboi
well then it might be a planet by ONYX plus why would the sentinals be pissed off they were programmed just to stay there after the dyson sphere was put up?
Oh yes, there's obviously another Forerunner planet right next to Onyx that nobody seemed to notice in the decades humanity knew about it. -_-
The Sentinels were hostile to everything, they engaged and destroyed Voro's entire fleet.
The final Terminal makes things pretty clear that Bias has sent John to the Forerunners to prove his atonement, it is noted that there are no Forerunners inside the Dyson Sphere - which is only a few meters in diameter in normal space - and so therefore it CANNOT be Onyx.