Check it out for yourself!
And for those of you who want to get more out of this than just pretty new animation, though even that is awesome to see, Kanzenshuu has as usual put out a full translation of what can be taken from this trailer. Here's just the character dialogue itself -
Narrator: Several years after the life-and-death battle with Majin Buu, he paid a visit to the peaceful Earth - A being that surpasses everything: Birusu, God of Destruction.
Vegeta: He's the most fearsome thing in this world: a god of destruction!
Kaio: He has a completely different dimension of strength!
Uisu: The entire solar system will be destroyed in the blink of an eye.
Birusu: I'll have the pleasure of destroying Earth.
Goku: Destruction ain't somethin' to take pleasure in!
Narrator: Now, the curtain opens on a battle with the entire universe on the line!
Krillin: The Earth is doomed!
Narrator: Then, he will appear - The legendary warrior,
Birusu: Super Saiyan God!
Narrator: The movie 'Dragon Ball Z: Battle of Gods'!
Goku: Opens on March 30th!
So nothing really new storywise can be pulled from this, but lots of new scenes are shown, such as Gotenks receiving a spanking from Birusu, Great Saiyaman pelvic thrusting, a singing Piccolo, and a great group shot of the entire gang. March 30th can't get here soon enough!