,I agree these teams are very close at olympics fai/sca may very well beat Koh/nov and if Deo/Sho are not fit for the Olympics Pec/Bou will surely beat them (if d/d shows up that is unlikely).
Worlds is different issue, Dom/Shab will retire after Olympics (unlikely to stay on even if they don't get the gold) and Koh/Nov will be russian No.1, they will surely get the boost there starting CD.the inflation in the score will be enough to keep french and italians at bay even if they make mistakes at FS
I know that history speaks in favor of your theory, but I cannot see the russians supremacy to keep it going in the next Olympic cycle, simply because Koh / Nov are not good dancers. I am sorry to rain on the russian fans parade, they are just OK, except their lifts and that is not dacning!
And by the way, there was interuption in their string between Krylova and Lobacheva, so it won't be an inconceivable thing, and those teams were alot better than Jana and Serghei ever will