Pretty Sure It's D,D,F,F,A (Close) on X360, And D,D,F,F,X on PS3.

I can't do The Joker's card fatality either. I've read it 100 times and done exactly what it says and NOTHING!

its on here
http://www.angelfire.com/va3/mk/mkvsdcu/main.htm#shang

hold block when u do the jokers card fatal thats how i do it and it works .

I can do both fatalities, just press the buttons a little more faster =)

MKvsDC's fatalities really threw me off. You actually have too take things somewhat slower this time around. Madly bashing the buttons doesn't do the trick.

The REAL trick is when you have F and B movements you have to wait untill the character makes a full step before tapping another direction button.

So it would be

D - D - F (slight pause) - F - Y (or A if that other guys correct).

If that doesn't work, go on Youtube and search for your fatality, watch the characters movement too really know the pacing.

Once I got the akward pacing down I had no problem.

Yeah I had to do that finisher fast to make it work. I didn't tap the buttons, instead I left my thumb on the D-pad.(PS3)