User blog comment:Thailog/Ep. 201 "Happy New Year!" discussion/@comment-130.18.116.74-20120427155304/@comment-72.64.122.69-20120427204713

That would explain how beast boy and nightwing got their. Only thing I'm 100% sure about is that the invasion takes place either 16 hours, days, weeks, months, or years after a significant event.