I feel its more likely that the traveler is just going to leave at the beginning of Destiny 2. Might be wrong, but the Traveler doesn't seem very altruistic by the way it bugs out on the races in the Hives way when there is trouble. Think its only function is to advance civilization and promote the growth of civilization to serve the light, but might be wrong. Now that the traveler is free to restore its light and heal... once its done doing that it might just move on to spread the light elsewhere. In this process we will discover something of the "true" nature of the Ghosts . Traveler farted out ghosts that speak perfect english yet the traveler itself is never recorded as communicating at all? Sounds suspicious, not to mention how... humanlike all the ghosts seem. Sort of brings to mind the Exo grimoire card where it talks about how it doesn't make sense for Exo's to have emotions, they don't enhance their capabilities in battle or in labor... so why? Why give the ghosts human like personalities? The "Light" will be ripped from you by the traveler when it leaves, leaving you somewhat of a husk, (remember the concept art showing your guardians clad in embers of fire? The remnants after the fire has burnt out) And this is what will cause the character item reset, as the items we have and our power as guardians are based on the power we have received from the light. Anyway, sum up my theory, Traveler leaves, light is ripped away from us leaving us nearly powerless and in a desperate fight against enemies only too happy to take advantage of our weaknesses, and we need to find other paths to power (Osiris anyone?)