Oh, Oh, Oh! Pick me! In one of the concept art images, it shows the Fallen and Cabal together under some sort of mysterious "influence" (dark army anyone?) Also, the eyes have turned blue, the armor black, and the strange black mist is seeping out of the Fallen and Cabal. I think the Glimmer are mind-control beings that have extreme power, and will be behind-the-scenes and playing puppetmaster throughout Destiny's story. The Glimmer are making me scared already. Edit: the Fallen and Cabal are walking sort of zombie-ish...