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.
After the events at Ilos, Cerberus became almost obsessive about the prothean design of the conduit. After studying it for quite some they found a way to build the design into an experimental ship. Two, Point to Point Massless Corridor Nodes (One on each wing) that allows the ship and several ships in its fleet to jump at near mass relay speeds without the need for a Mass Relay. Extremely expensive and equally large draw backs but may come in handy for quick escape, or if you are feeling ballsy a back door into an enemies base.
After looking a V1 I realized it was structurally unsound to make a ship capable of modifying mass that long. The ship would ripped apart by the tidal forces. I consolidated the design made it smaller and added structural supports along the center section to help keep the ship together during its perpetual zero mass state.