Game Trailers TV has posted an episode on Mortal Kombat vs. DC Universe. Most of the 21-minute episode is a “making of” feature on MK vs. DCU, with interviews and video clips showing various characters in battle: Superman vs. Sub-Zero, Flash vs. Sonya, Batman vs. Scorpion, and more.
There’s a little about the storyline: cataclysmic events occur in both the DC and Mortal Kombat that result in the worlds merging (it’s called “Worlds Collide” after all), and each set of characters thinks the other is responsible.