So here's an interesting post from Colin:
Just a quick update on where the whole scavenger hunt system stands since I know that’s a topic many of you have brought up recently. We’re not currently actively working on building any sort of legendary precursor scavenger hunt, this is something we want to do in the future and we’re in the midst of designing how this would function, but no one is actively building this feature and you should not expect in the Jan/Feb/March releases at this point.
We are however working on expanding reward systems to make them more re-rewarding across all parts of the game, making the open world more rewarding, and adding new ways you can earn precursors as rewards via new reward systems taking advantage of our open persistent world.
Some of these additions will come as early as the January release, and will get covered in more detail in the next week or two as well release all the details about this release once testing has signed off it’s all ready to go in January. (we’ll also provide a high level summary of our goals with reward systems, etc. in our 2013 blog post, which should be out next week)
So, what are you thoughts on the whole percursor issue? Is a Scavenger Hunt even enough of an achievement for such a thing? The closest GW1 had was the Black Moa Chick which ended up revolving in nothing more than a Wiki-search.
The best I can think of is tying the percursor reward to something that's actually hard to do (Mad King Clocktower anyone?).