Hector Sanchez the Producer of Mortal Kombat just posted this over at the SCEA blog;
The Mortal Kombat development team is proud to announce a first time opportunity for members of our Kommunity to come online and face us in Mortal Kombat! We've never done anything like this before, and we're looking forward to facing some of the top Kombatants on PSN. Maybe we'll learn a thing or two! ;)
We invite you to fight against the developers of Mortal Kombat vs. DC Universe, including franchise co-creator Ed Boon, tonight, Jan. 23 from 10:00 P.M. - 12:00 A.M. (EST). Meet us in the MK room we created for this occasion and look for the following PSN IDs: Kamidogu, MKNoob, MKHornbuckle, MKABACABB, MKHanzoHasashi, MKBlindKenshi, MKTundra, MKApep, MKKetchup, MKMustard, MKSkully, FreezeGoroSweep.