User blog comment:AdamGregory03/Top 5 Death Battles I Don't Want to Happen/@comment-25182985-20151125033010

Thing is Sub-Zero VS Ken Masters does make sense. Allow me to explain.....

Both Sub-Zero and Ken Masters are the rivals (In Ken's case, friend rival) to the poster boys/mascots of MK and SF. The difference is that  whereas Ken is a friendly rival and best friend of Ryu, with Scorpion and Sub-Zero, they're mortal enemies and true rivals towards one another.