The reapers have returned from dark space. With Earth under attack and the mass relays in a state of chaos from refugees and the councils fleet engaging reaper forces the galaxy is a mess. The outcome is unknown, the warfare is devastating. The galaxy will never be the same.
Based on art by bioware.
Has a reaper like look to it.
that might be the point- if this were the design originally intended for ME2, it'd make sense... so far, he said it's based on Bioware's art, so we don't know for sure... oh so vague v_v
Art of Mass Effect, Page 169.