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!