Further studying shows that the next game moves on to the Cold War rather than further WWII operations. That's too bad, I was hoping to hear Katyusha or I Don't Wanna Set The World On Fire on grammophones.
According to the review, the next game takes place in the early 60s at least, and the player character seems to be Strogov still, judging by the screenshots. Seems he's still serving Soviet intelligence even though SMERSH was disbanded by that time.
Also in the review, locations include the US, Europe and Cuba(!!!). If that's the case, I wonder if Haggard Games hired actors who speak perfect Spanish with the right accent...