User blog comment:Super Sub-Zero/Mortal Kombat X Wishlist V.2/@comment-25083289-20140619235957/@comment-26454032-20140620195539

They already said they are adding "Tons" of new characters though. Ed Boon has even said that "X" can stand for "Next generation characters".

NetherRealm wants to add a lot of new characters. And that isn't a bad thing, because the last game had mainly returning characters. Plus, if they wanted to do it, now would be the time, new consoles, new characters.