yea something like that. It was just a concept thought... We don't see too many MOBs in PvE with Charmed animals... So I was thinking that would be a interesting place to see a few. Other then hell hounds... But your right... Undead would belong in underworld. unless you think of it as they merged with nature or something like that. Similar to the Crystal Desert ghosts...
I had heard of something being drawn up for Lyssa in the past dealing with a Ruins of Orr area of the map... but either it got dropped for something else or its sitting on someones desk forgotten about. We may see it appear in the next chapter as a new bonus area. Lets hope

Anyways that's why I was rather vague on that one, as I thought I seen something on that before...