Here is the full list of all 43 Mortal Kombat vs DC Universe trophies - there are 34 bronze, 3 silver, 5 gold and 1 platinum.
You Unlocked All Trophies!
Complete Arcade Mode with all MK characters
Complete Arcade Mode with all DC characters
Beat Arcade Mode on Max Difficulty Without Continuing
Play 200 Versus matches
Play 100 Chat Lobby Matches
Perform All Super Moves and Promoves
Complete all Kombo Challenges
Complete Darkseid's Kombo Challenge
Complete Shao Kahn's Kombo Challenge
Complete Green Lantern's Kombo Challenge
Complete Captain Marvel's Kombo Challenge
Complete Lex Luthor's Kombo Challenge
Complete Deathstroke's Kombo Challenge
Complete Wonder Woman's Kombo Challenge
Complete Baraka's Kombo Challenge
Complete Liu Kang's Kombo Challenge
Complete Kano's Kombo Challenge
Complete Jax's Kombo Challenge
Complete Kitana's Kombo Challenge
Complete Shang Tsung's Kombo Challenge
Complete Sonya's Kombo Challenge
Complete Sub-Zero's Kombo Challenge
Complete Catwoman's Kombo Challenge
Complete Superman's Kombo Challenge
Complete the Joker's Kombo Challenge
Complete Batman's Kombo Challenge
Complete the Flash's Kombo Challenge
Complete Raiden's Kombo Challenge
Complete Scorpion's Kombo Challenge
Perform all Fatalities and Heroic Brutalities
Perform a 10-Hit Combo in Arcade Mode
Get a Flawless Victory Online
Complete Both Mortal Kombat and DC Universe Story Modes
Complete DC Universe Story
Perform a Heroic Brutality
Finish Arcade Mode with a DC Universe Character
Complete Mortal Kombat Story
Win a Chat Room Match
Finish Arcade Mode with a Mortal Kombat Character
Perform a Fatality!
Perform a Free-Fall Transition
Perform Klose Kombat