User blog comment:Bioniclepluslotr/The Animal Union/@comment-402843-20090414221834

the blue portals were time portals (which i may explain later in shadowwing, though i don't know how). something (which i don't know what yet) was sent back from the future long before nightwing. moments after the "thing" was sent, the AU sent a retrieval team to get it or destroy it to get rid of the evidence of time travel (cause they don't want humans to know). however, the time they arrived in was long after when the "thing" was sent to, but they still found it and destroyed it along with themselves.