This being the Council's secret "preservation of civilization" plan would make them look slightly less blockheaded; but I suspect that Azarhal might be correct. This sounds like an exploratory mission. I'm not yet convinced that it's linked to the Reaper invasion. I'd say I'm feeling 50/50 on it, seeing the possibilities in either direction.
Also, it wouldn't be "the elites" that were sent. Sure, some elite douchebags would find their way aboard the project. The real focus, though, would be on making sure every single member could contribute needed skills and healthy genetics. They have to colonize a galaxy. Everyone needs to contribute essential skills, and ideally nearly everyone should be a breeder. (I know the last part will make some scream and wail and make silly claims of cloning technology, which the council races simply don't have.)
By elites I mean the most powerful people in government(s) and industry who made this happen, accompanied by the best and brightest, best genetics, best experience - academics, scientists, soldiers, engineers,etc required to ensure the success of the mission and hence the continuity of our civilization.