whew. okay. .lessee
to me making an "ark" would be common sense. if you're facing annihilation--a good old time religion biblical Deluge--you'd want sum to escape to prevent extinction. What i'm unsure of is Why it would have to be out of the MW? (maybe this was covered. i did have to start scanning). From what i understand, there are vast regions within the MW that are pre spacefaring and without active relays. So, the question is, would the Crucible Beam affect literally the entire galaxy? Or just the regions connected to the relays?
Seems it would be easier to ark ppl out to one of those regions. assuming the beam doesn't affect those areas. and ofc the Reapers weren't interested in pre space faring species and regions. that would still be a pretty hefty trip. the MW is vast.
i think the question of whether or not everyone knew abt the crucible is irrelevant. it doesn't matter cuz even if they knew abt it, they didn't know if it was gonna work, or kill them all and reapers. if they waited around to see---and the crucible killed everyone or didn't work on the reapers, then they kinda missed their chance. a chance that may be tied to needing an energy source capable of catapulting them out of danger. (whether that's sum far flung region of the MW, or another galaxy altogether)
Heck, maybe the Crucible was that energy source. harnessed sum way to catapult them into a one way trip. cuz it would have to be a one way trip. with everyone understanding that and willing to take that chance. otherwise, the idea of why they didn't come back to see what happened is problematic.
regardless, it would have to be a giant energy source and a one way trip. (Ah, but i could see a plan to try to get to another galaxy because maybe ppl did not know whether, or not the beam would affect the entire MW galaxy, or just the relay connected ones. you know the crucible was really as big a threat--if not more so than the reapers. a complete unknown. so, maybe they would indeed try for another galaxy?)
i would find it hard to believe, tho, that other species over the years did not also attempt arks. millions of years this reaping has been going on. so, we could run into descendents of previous species that escaped to these far flung places. But man, the memory of how and why they got there would be long gone. a distant, distant myth at best. cuz they would have been there for potentially 50,000 years and even hundreds of thousands of years. evolved completely differently. the whole thing. not to mention native species to the regions.
I'm tired now, but there's sum interesting stuff here. And imo plausible. Obviously no one has Any Idea what BW is gonna do, but sum kinda ark would make sense to me. simply because of the desire to preserve the species in the face of total annihilation. it would be foolish not to. and BW does like its religious mythology..
i'm, personally, okay with not seeing the citadel;omega...etc again. especially the citadel. i would like to see a new giant hub world and all that. buuut idk if that's what BW is abt. they said ME next would be fresh and new, but still recognizable. ark theory is fresh and new, but i'm not certain how "recognizable" they could make it in this hypothetical situation.
i like it. i think it's a good idea. not cuz of the endings of mass3. i could give a crap all abt those. it just sounds like it could be quite a grand adventure.
but don't get your hopes up.