Millennium was a DC Comics crossover miniseries published in the year 1988... twelve years before the actual millennium change. The basic concept was that the Guardians Of The Universe chose ten humans to father the next race that will take over their duties, and they ask Earth's heroes to protect them from the Manhunters, a race of androids with a grudge against the Guardians. Things get more complicated when it turns out that the Manhunters have infiltrated the personal lives of all of the heroes.