I keep thinking I'm about to get too 'heavy handed' with my hints, thus robbing you guys of the satisfaction and enjoyment of figuring it all out. But possibly I'm being entirely too vague - whether due to the elapsed real time between in-game events or due to my knowledge of the big picture making things more obvious to me than to the players (or maybe a combination of these and other factors).
Regardless, here's a little tidbit that some of you should remember - Deasaigh (already suspected by y'all in the killing of your guard contact) always kept his face covered with a long crimson scarf. And one of your early foes (two of them, if you count both times you ran across it) was a shadow demon. So there's one half of the 'opposing forces' from the vision. I'll leave you to conjecture about the relationship between the two for now, but . . .
There will be more information forthcoming, but I'm gonna try to let things unfold in-game first. I will go ahead and tell you that my goal is for all (OK, most) of the major events in the game to tie into a comprehensive story-arc, so it's a good bet that anything major seeming that happens will relate somehow. (On the other hand there is a lot going on, and it's very possible that my poor mortal brain will lose track of some of it - and I've never been a good note maker . . .)