The official 2011 release (PS3/PC/Xbox 360) focused on providing "arcade-perfect" experiences rather than home console ports: Mortal Kombat Arcade Kollection
Thus, a true arcade-perfect PS2 ISO is more a passion project than a polished commercial product.
The —which bundles the original Mortal Kombat , Mortal Kombat II , and Ultimate Mortal Kombat 3 —was released years later for the PlayStation 3, Xbox 360, and PC. However, if you are looking for those arcade-perfect klassics on your PS2, there is a "complete story" of how to get them. The Real PS2 "Kollection": Midway Arcade Treasures 2
Thus, the "MKAK PS2 ISO" is , not a retail leak.