It goes as such:
Prison of Elders is reworked and light leveled-up to the new light cap. Starting at the lowest light arena, you get "taken" VoG gear. Then "taken" crota gear, so forth and so on. And at the highest level, "taken" versions of any of the raid gear drops at the highest light, randomly. This includes weapons.
Have a good day with this knowledge in mind.
EDIT: I cannot post my source, when April comes you will see. Thank you.
EDIT EDIT: Keep discussing, guardians. April Update will show this to be true.
Edit #3: For all the naysayers: you have an opinion, fair enough. Let the update show you. Make sure to Necro this post and look at how doubtful you were.
FINAL EDIT: What Urk said does not invalidate this. I said it means that gear drops in updated PoE, which isn't the old raids.
FINAL FINAL EDIT: Looking deeper, Urk claims old gear won't return. But wasn't Darkhollow and "Harrowed" Darkhollow gear listed as completely separate? Do keep that in mind.
LAST MINUTE UPDATE: The new strike, Blighted Chalice, will be in the Hellmouth and involves Fallen who have mistakenly freed Malok, whom we all know from the Hunter legendary helmet listed in the armory.
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Nice prediction! Here is mine, the guardians pictures are actually guardians from now, the taken have found a way to harness Skolas's power of "tainting" a guardian's light and this is the battle to find the source of the power to stop the guardians from being taken. The fight will span across all raids and prison of elders culminating in a mission taking place on the dreadnaught where we find out it is Eris who has betrayed us! I will check back in with this post after Wednesday to see which one of us is closer. This is a major SWAG on this subject but it was fun to think up the scenarios!