I feel like at some point the Traveler unleashes some sort of awesome power and possess the Cabal and the Fallen and you fight alongside them in some epic battle against a darker more powerful enemy. (I think it'll be the moon base hell mouth guys or have something to do with the pyramid space ships) But these are all my predictions, either way I know whatever happens it will be awesomely epic they are cinematic story tellers after all, what do you guys think?
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In a way, that does make sense since its pretty clear that every single one of these enemies CAN see the Hunter or they have the ability to. He's not trying that hard to hide from them.