Please note: This article may contain spoilers related to the storylines of Prophcies and Nightfall.
Recently, while doing the Abaddon's Mouth mission in the Ring of Fire Islands, I couldn't help but take note some shocking finds that seem to suggest the prescence of a certain fallen god.
Obviously, the name Abaddon's Mouth seems to imply that Abaddon has some tie to the region, but it has been argued that the name alone is very circumstancial evidence.
However, I believe I have found evidence to show that Abaddon does indeed have ties to the area, and that the Door of Komalie may feed directly into the Realm of Torment.
Here I have complied several screenshots and featured the concept art of Abaddon along with them. Take note of the similarities marked.
Also, keep in mind that the Art of Guild Wars bonus concept art book describes Abaddon's Mouth as being a volcano posessed by evil, which causes the lavaflows to harden into disjointed evil faces.
On the surface, it seems that this posession is simply alluding to the Titans, and until Nightfall, it could probably be reasonable to assume this meaning. However, I believe the evidence I am providing shows that this posession is in fact Abaddon.
One discrepancy I noticed, and took note of, was that, while Abaddon is shown with six eyes, the formations only have two. I have no explanation for this. Perhaps the visages are not Abaddon's, but only influenced by him.
I also believe that the Door of Komalie may lead directly to the Realm of Torment where Abaddon is being held. From what we know of Nightfall, Abaddon is described as being "sealed" or "imprisoned" in the Realm of Torment. "Sealed" or "imprisoned" are logical words one could use to describe being trapped behind the door. Also, the Guardians that emerge when the ether seals are broken and the door opens temporarily are "corrupted" as the ghostly Jacob tells us. They were driven mad, while some, as himself, were pure of heart enough to remain. This seems to suggest that after being inserted into the soul batteries, the Chosen souls enter the realm of Torment.
Furthermore, concepts for the Realm of Torment show the landscape made out of faces and other body parts, similar to the Ring of Fire lava formations, only made of flesh instead of pumice. Another clue is the prescence of the anatomical oddies known as flesh golems (fire golems in Cantha).
My final piece of evidence comes in the form of a screenshot. When I noticed the swirling shapes behind the Door of Komalie, something very obvious stood out to me--they had a shape.
Yes, I believe that what we are seeing here is in fact the form of Abaddon in the fire behind the Door. Note the features I have highlighted. Also note how the portal from which the souls are escaping bears a strong resemblence to the chaos portals seen at the Dragon Festival and the Tomb of Primeval Kings.
One or two of these things alone might be dismissed, but all of them together, further coupled with the name "Abaddon's Mouth" seem to strongly suggest that Abaddon is in fact trapped behind the Door of Komalie.
I would theorize that because the Chosen stopped the Lich before he could adequetly finish his summoning of the Titans, Abaddon was not able to use the Door as a means of escape. However, enough of his essence was able to escape, possibly in the form of the spirits we see emenating from the portals, that he has been able to re-establish himself as a upcoming force, which we will see in Nightfall.