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