Zero is good for what it is; a +4 year old engine. I think that they'll probably do a major revamp on it to remove all of the old, depreciated, and Star Wars specific content that's built into it.
Of course that probably won't change some of the core stuff like the way that models are stored(.msh's wrapped in .tga's) ODF's and the like.
Something I really hope to see is better AI, specifically automatic hint node and path generation. My idea is that the paths and nodes would be placed based on the size of world objects and terrain features, like water and cliffs.
Now that would be cool.
But, I'm just talkin'. I've got no idea what they're up to.
