It hasn't been confirmed that there's an Ark ship, right? This is all speculation still?
Apparently there is at least 1 Krogan collonyship, which you have to save for your Krogan squadmate.
I think they left during the reaper invasion. Just after the fall of Thessia. Continuity of Civilization.
That would be about one month before the ending. Using reverse engineered reaper hyper-FTL they'd be well out of range of the blast.
Interesting possibility, thoguh they likely needed some time for that work.
Also, if you save that indoctrinated Asari from Saren and let here live in ME2 she ends up working on secret asari Reaper Projects between ME2 and 3 until the reapers return in ME3 and "assume direct Control" of her and start killing people and let loose a bomb.
That Project might have had something to do with it. They might have been workign on it for a while and that coudl have been the launch date, when the Asari councilor thoguht galactic civilisation was lost. Also, it makes sense that the Asari would take such an initiative sicne they value the companionship of other species for the sake of their own reproduction and for companionship. They care for diversity and that would speak for the ARK Project being Asari if it isn't Council backed.
It's N7 Moses.
Interesting suggestion as an alternative to Noah. Personaly I Think Noah fits better if you brought people from every species, rather than just one Group of people on an exile.
Personally I don't think it was an Ark at all, but a small fleet that was the remnant of a battle with the Reapers that picks up survivors as they flee and make their way outside the galaxy.
A possibility, but it seems the sucessrate would be a lot lower and it seems such a ragtag fleet would be lacking in Resources and preparation for such a journey which might take centuries or millenia and possibly requier quite a few stasispods and energy and supplies to supply it all for such a lengthy exodus.
Lots of interesting theorycrafting and speculation people