I'm a little cynical, but I don't expect Urianger to be anything other than an ally simply because I can't see them killing him off given what we know about NPC's who are tied to quests that aren't part of the MSQ's. Which is a real shame because it did, in my opinion, greatly dampen the impact of 2.0's finale. I feel like the WoL needs to endure more tragedy simply to offset the convenient plot device of being able to defeat pretty much any threat that comes their way. The alternative, of course, is to simply have antagonists win from time to time (and by win, I mean 'win' - not earning a tiny victory and then being destroyed shortly afterwards).