Checked the trophies after the new patch that got released for PS3 earlier, a new DLC has been added to the trophy section.
Its called: Mr. Torgue's Campaign of Carnage.
It has three trophies:
1 Bronze - Explosive - Complete the mission "Long Way To The Top".
1 Silver - Motorhead - Completed all Campaign of Carnage side missions.
1 Gold - Obsessed - Collected 10 pictures of Moxxi in Campaign of Carnage.