Now this is just a theory that occured to me, which is totally possible theoretically but I have no evidence it has (or will) ever happened.
The Lesser Evils (Duriel, Andariel, Azmodan, and Beliel) do not have to be malicious entities from before the dawn of time or anything at all like that. Andariel, for example is the grandaughter of Mephesto and the daughter of Lilith. Her lineage is purely demonic so she can be a Evil. So anyway, it is possible for more lesser evils to be produced, one could even ascend to Prime Evil if it came to it, or Diablo has a baby brother coming.
Like I said, it's possioble but theres no evidence it has or will happen, though it would explain the absence of an almighty Demon to kill.
The Lesser Evils (Duriel, Andariel, Azmodan, and Beliel) do not have to be malicious entities from before the dawn of time or anything at all like that. Andariel, for example is the grandaughter of Mephesto and the daughter of Lilith. Her lineage is purely demonic so she can be a Evil. So anyway, it is possible for more lesser evils to be produced, one could even ascend to Prime Evil if it came to it, or Diablo has a baby brother coming.
Like I said, it's possioble but theres no evidence it has or will happen, though it would explain the absence of an almighty Demon to kill.
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Sister sites.