Ok, ONE of the best fatality ideas for Mortal Kombat Deception:

The victim is split in two, from top to bottom. However, they are sliced from their sides, thus separating, amongst other things, their face from the back of their head.

Think of all the gore that would be available to be spilt upon the ground. This fatality would require very high quality detail. Detail would need to be put into every human internal organ, blood transportation system, skeletal network, muscle meats, fats, body fluids--you name it!

Allow me to illustrate:
If you were to take a 100-page book, stand it up, with the cover facing you. Next, you turn that book to the side, either side, with the binding of the book, or the page ends facing you. Then, you slice that book in the middle, and down, so that the first 50 pages are separated from the last 50 pages.

If you fail to comprehend this illustration, please do allow me to give you more illustrations.

This is one of the best fatalities I have ever read or heard about.

You can't beat that. If you can, try me!