There are 10 new Trophies in this DLC.

 

Bronze

All Together Now    
Kill the three end bosses in Chapter 5 (Harry Flynn, Eddy Raja, Zoran Lazarevic) within 20 seconds of each other on Hard    

Air Mail    
Get 24 Return to Sender Medals    

Statuesque    
Get the Curator Medal while on Hard Difficulty    

Payback is a…    
Get 50 Retaliation Medals    

Colonizer    
Get 50 Expansionist Medals    

Everyday I'm Tauntin'    
Get 50 In Your Face Medals    

How's That Taste?    
Get 50 Fisticuffs Medals

 

Silver

Treasure Domination    
Win a Plunder game without letting the opposing team score (5-0)    

And Stay Down!    
Win 50 matches of Elimination    

Omnipotent    
Complete a Co-op Adventure Map on Crushing Difficulty without losing a single life

   

http://www.ps3trophies.org/game/uncharted-3-drakes-deception/trophies/