I really like this idea, and an implementation along the lines of what itspomf suggested would be a really cool feature to have (it reminds me of something SWTOR has, actually), but the sheer amount of areas and PoIs ANet would have to write lore for is an incredibly daunting hurdle. There are easily over a thousand areas and PoIs by now. So, if they want to do it, more power to them, but I don't see it happening any time soon.