I finally got around to watching it and yeah.
An off-Screen AR.
I will assume you are Dragonball fans so no detailed explanation.
Empror Pilaf and his 2 henchmen Shu and Mai appear in the movie and it appears they did make a wish to the Dragon after the events of Z to make themselves young.
Shenlong made the 3 a tad too young and turned them into children.
Trunks develops abit of a crush on Mai in the movie.
Mai in Dragonball:
An Age-Regressed Mai in the movie:
http://saiyanplanet.com/battle-of-gods
Her first appearance is at the 27:00 mark.
And she a good amount of screentime and lines in the movie.
Check out 38:35, hehe.
But yeah if you're a Dragonball fan, the movie is definitely worth the watch.
Bills is cool!