though the few bits of information are just that..only a few bits..the game is in production,it has been in production for some time,and its supposedly goin to be the goriest and most brutal MK to date...and its going to stray very far from the last installment which was only a "fuck around" game with no particular focus put in on anything but the graphics and new fighting system which brought a nostalgic feeling back to anyone who is a veteran of the original MK's..before they were 3-D...the most official updates i can find on this game are Ed Boon's twitter page..though nothing too revealing..heres something i found tight..its not much but a view into the degeneration of the flesh and muscle of your character when taking damage..check it.
http://twitpic.com/ic65y