The story may seem odd for people unfamiliar with the era that the film takes place, but it is perfectly situated. Whereas, WWII was the quest for religious artifacts that possessed supernatural power, the Cold War was a time in which interest in Paranormal studies were peaking. There were several homages to past characters who are no longer with us and the return of a few who we've missed. If you're a fan of the franchise I cannot see how you'd be too disappointed.