I didn't say that the Summoner created the Arcane Sanctuary, I said he used demons to defend it, which ended up destroying him because he became a slave to the will of Hell. I also never said they were the same person.
Horazon's death's source is unknown, but it's safe to assume his meddling with demons, which caused equally disturbing events in all the other people I mentioned which you neglected to acknowledge, did him in.
Furthermore, on the corruption of the Summoner because he meddled with demons:
After killing The Summoner, Deckard Cain tells the player that the sorcerer most likely got dragged down into Hell by the demons he was bound to, and warns the player against practicing demon magic.
Quote from name="Arreat Summit" »
The Summoner believed that he could bend Evil forces to his will. What he didn’t know was that Evil uses man, not the reverse...
So, I don't believe demonic summons would be viable for a character.
I'm not entirely sure how the Witch Doctor is compared to the Necromancer of the past, but so far the trend has been the same- summons are limited to undead, strictly. It's noted in the lore of, I think, every class of the previous games that involvement in the exploitation of demonic magic and/or demons, themselves, often leads to corruption (not just limited to in a Paladinic sense), and as such, this isn't a method used by the heroes.
Many characters in Sanctuary have tried to use demonic magic for good and were subverted by it, including, but not limited to, The Summoner, Nihlithak, The Countess, etc.
In fact, it's been noted that the Summoner had been using subverted demons to guard his Sanctuary and was subverted, thereof, rather indiscreetly, by NPC's in Act II, and in lots of monster lore, including that of the Imp (which first comes to mind- check the Arreat Summit for complete details), that they allow themselves to be summoned for the soul purpose of corrupting the summoner.
So I don't think we're going to be seeing enslaved demons as summons. However, I'd imagine a great deal of undead summons are definitely not out of the question.
Horazon's death's source is unknown, but it's safe to assume his meddling with demons, which caused equally disturbing events in all the other people I mentioned which you neglected to acknowledge, did him in.
Furthermore, on the corruption of the Summoner because he meddled with demons:
So, I don't believe demonic summons would be viable for a character.
Many characters in Sanctuary have tried to use demonic magic for good and were subverted by it, including, but not limited to, The Summoner, Nihlithak, The Countess, etc.
In fact, it's been noted that the Summoner had been using subverted demons to guard his Sanctuary and was subverted, thereof, rather indiscreetly, by NPC's in Act II, and in lots of monster lore, including that of the Imp (which first comes to mind- check the Arreat Summit for complete details), that they allow themselves to be summoned for the soul purpose of corrupting the summoner.
So I don't think we're going to be seeing enslaved demons as summons. However, I'd imagine a great deal of undead summons are definitely not out of the question.