What is the Ancient Enemy?

What I know so far about Halo 4 is that we will be facing a powerful ancient threat to the galaxy. Any ideas?

I have two theories. The flood is still a threat and their are other Flood organisms on the other Halo rings. #2 From watching the Halo: CEA Terminal videos the Forerunner machines are malfunctioning and going are going rampant. Or maybe both.

That thing in the concept art video was defiantly not the flood. Flood don’t stand 14 feet tall with glowing red eyes.

But the flood will still be a part of the game as an enemy. It can refer to either the forerunners or the precursors.

> That thing in the concept art video was defiantly not the flood. Flood don’t stand 14 feet tall with glowing red eyes.
>
> But the flood will still be a part of the game as an enemy. It can refer to either the forerunners or the precursors.

You never know flood were equally scary as well. And with enough biomass whats to prevent the flood from being Colossally huge.

Still, it’s depicting the Precursor but the terminal points to the reclaimer should fear the Didact more than the flood since the librarian isn’t around anymore. There’s defiantly a lot of possibilities to roll with.

> You never know flood were equally scary as well. And with enough biomass whats to prevent the flood from being Colossally huge.

I sure would hate to face a flood-infected Gúta!

Flood will almost certainly be there.