User blog comment:Cainelee20156/Call of duty World at War 2 IN 2015?/@comment-356904-20150103232157/@comment-3967954-20150104085429

Literally the only connection between Black Ops and World at War was Reznov and Petrenko. The Nova 6 stuff with Dragovich and Kravchenko had no connection whatsoever to the events of WaW. The rationale here was that Treyarch wanted to expand on characters that the players were already familiar with, and in no way did they intend BO to be WaW 2. It's like saying Call of Duty 3 is actually Call of Duty: UO 2 because Doyle is in it.

Having said that, WaW was probably a standalone thing and I doubt there will ever be a true sequel.