In theory that last part could just mean the Traveler wants you to revive it so it can escape the second coming of the darkness. The piece of evidence that comes to mind to rebuke your theory would be the final moon mission in which the Hive are performing a ritual on the Traveler to weaken it. Although the thought that the traveler created ghosts to revive long dead soldiers (necromancy) could also point to the traveler being evil. Or one could say that the Traveler is able to do this because it increased our life spans and what not. There's two sides to every coin.