Now I was skimming through Halo: Cryptum, and came across an interesting quote that sparked a thought in my mind.
Below is a quote from the Didact’s dead children, speaking in memories to Bornestellar:
> “A chorus of voices rose from the sphinxes-etched and hollow. I could understand only a few chopped phrases:
> ‘They are out there, waiting …’
> ‘Thousands of years wasted!’
> ‘The solution was lost Father … Lost!’
> ’If what the Old Ones made is loose …'
>
> I stepped away from the ellipse, terrified.”
Now, the first few phrases that his children muttered are pretty self explanatory. “They are out there, waiting …” refers to the flood actually existing, when some forerunners believed it was a human made myth.
“Thousands of years wasted!” implies the time the Forerunners wasted when they exterminated the humans and later quarreled among themselves instead of finding the cure.
“The solution was lost Father … Lost!” clearly means with the de-evolution of the humans, their secret of the cure to the flood was lost.
Now we move on to the most interesting part.
> “If what the Old Ones made is loose …”
This line is very intriguing. To the Forerunners, the ‘Old Ones’ are unquestionably the Precursors. This line is referring to the release of the Primordial on Charum Hakkor. But it’s important to pay attention to how this line is worded. They used the word ‘made’. This could mean that the Primordial was more of a science project by the Precursors. Kind of like Dr. Frankenstein’s Monster.
Now this is where my idea takes another twist. If you combine this with what the Primordial said in Halo: Primordium, where he tells the Didact there is no difference between the Precursors and the Flood, it is actually telling the Didact that the Precursors suffered the fate of their creation and were consumed by the Flood. The Primordial did not lie to the Didact, it just found a tricky way around the explanation. The Precursors created the Flood and were consumed. They were taken in because of their spite of not defeating the Forerunners. They could not wipe clean their creation that failed the Mantle, so they created the Flood, something to finish their job against the Forerunners. They did not realize however, that what they created had the potential to be stronger than not only the Forerunners, but the Precursors as well.