User blog comment:Kahn86/DLC MK9/@comment-216.163.216.5-20110426133525/@comment-2143406-20110427021148

Probably because they'd have the same moves as some other characters, like Frost would have ice powers like Sub-Zero, Chameleon just mimics other ninjas, Kobra/Kira/Jarek are just Kano in other forms.