IGN has new preview up of Titan Quest's expansion called Immortal Throne. In this preview they take a look at the the vast, desolate stretches of the Plains of Judgment:

This is the forbidding waste that, from time immemorial, every soul has crossed to reach the Tower of Judgment, and there be judged. It is also the home of most shades - all whose lives were neither exceptionally good nor terrible. Pale shades linger here and there across the Plains, over the centuries and millennia slowly losing the last trace of memory and identity, fading into empty, pale forms.

Vast? Desolate? based on the screenshots, id say that would be an understatement. Though its a good thing that we're getting varied locations, not just rehashes of the locales found in the original game.