I believe both Shiver and The Watcher would exist at the time of Myth3, since they are called ancient evils, but I don't know whether those two will make an appearance in Myth3.
We're certain to see Connacht and Damas. I don't think we know yet whether Myrdred or Moagim Reborn will appear. I'd imagine it's likely we'd see both Myrdred and Moagim Reborn, but... ::shrugs::
e3 has a page up with a couple of new screen shots from m3. Go to http://e3.godgames.com/ and click on the Myth3 preview icon. In addition to the older shots of a warlock, thrall, and a 'zerk with spears, we now have shots of an archer (whose pallid skin color suggests something sinister), a soldier of some sort, and a wolf-skin-wearing axe-wielding, helluva-tough sucka. Might this be Connacht?
-David
: Would we see Watcher and others two Fallen Lords(I don't
: remember their names) in Myth III?
: We see the Watcher in Myth TFL, but we can't see his
: attacks, how hw moves, his powers, etc...
: So, in Myth III we would see: Connacht, Myrdred, Moagim,
: Damas.
: And who more we would see in Myth III?
: Heron Guard King