User blog comment:Callofduty4/"blackops2" domain purchased by Activision/@comment-3123696-20120109170453/@comment-1142365-20120109180344

It doesn't matter if it's marketed as a sequel. If it's following on from a previous installment, then it is a sequel. Black Ops links right back to the Russian characters of World at War with Project Nova. That link earns it the title of sequel, even if it a a weak link.