I think you are reading into it too much. By "We" the person speaking is likely referring to the Forerunner people as a whole, or to a monitor(s). I think that there may have been a Forerunner on each of the halo stations as they fired, and they died of natural causes after the firing, and that the person speaking is referring to those few who survived. In this, I am theorizing that there is a location (like where the index is used) that is safe from the Halo's activation. One of the monitors said that they were once asked if they would fire the Halo's again if given the choice. This gives evidence that someone, Forerunner or human, knew what was going on when the Halo's fired, and survived the event at least long enough to talk to the Monitor.

I agree, except I think in what you're quoting, Kiloh, the "we" is the speaker, and humans (his audience, us). We all escaped, we all are witness to the aftermath. I think the "new AR" is the Forerunner who stayed behind to fire the Halos, and he has somehow survived in the Ark all this time.

Just one question. Just WHAT exactly would they put the sperm and egg idea in, in order grow a Forerunner? I SERIOUSLY doubt that it would be a human, and I think an incubation chamber is even less likely.

It could be they just wanted to find out why the hell 42 was the answer to life the universe and everything, and wanted to protect us until we figured it out!