The new ending DLC isn't out yet. I think it's due later this Summer.
Anyway, the Mass Relays are destroyed in every ending and the resulting explosion is what the Normandy is flying away from (in FTL, not through a Mass Effect field). They crash on a random planet and you should have seen Joker and another crew member or two leave the ship.
The other endings are fairly similar but the colour of the energy that destroys the Mass Relays are different. If you choose synthesis the same sorta thing happens but instead of the Reapers leaving, all life merges. On the planet the Normady crashes on the leaves have circuits in them and the crew members have tech in their skin. If you destroy the Reapers they blow up. If you destroy the Reapers and have a high enough Galaxy at War rating you should see a secret scene at the end where it appears Shepard may live.
If you wait until the end of the credits with each ending you should also get an old man and a kid telling the story of "The Shephard" set 1000 years after the event on the planet the Normandy crashed on.
Does that help?
