With DLC 2 comes new Quests and the Second par of the GT Saga. The little bot by the Time Nest named Spots will give you access to the new story mode!
You will first fight Nuova Shenron along side GT Child Goku while Pan goes and chases Giru, who runs away.
After you defeat Nuova Shenron, you must then go find Pan and stop Eis Shenron from kidnapping her! This time, you will be fighting with Pan to face off against Eis Shenron.