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.
One of the last models for Cerberus this is the massive base required to forge the Cerberus Titans. Regardless of your choice this pumps out the largest ship in Cerberus' arsenal.