Board Thread:Mortal Kombat X/@comment-5561191-20140912094911/@comment-187.62.9.111-20141016180952

Ferra and Torr are from Outworld.

I'd say it's more likely his face never appears because either:

they want to keep it a mystery, something nobody will ever know, or; they just don't know how he would look like.

I'm very sure there really isn't a deep, meaningful, reason why his face dosen't or won't appear.