The deal is the cost of hostile occupation, not the capacity for the red army to resist concerted technically superior force.
Sounds quite a bit like recent events, the more things change and all that.Molotov is likely to be killed in his assassination attempt which is likely to be 50/50. Stalin was paranoid, but that didn't mean no one was out to get him.
This could go horribly wrong, horribly fast.
If Stalin survives, then the NKVD will look for co-conspiritors and they will "find" them. They will also get "confessions" from them.
The question is, will those "confessions" implicate Zhukov?
If so, you'll see a short fight at the front as NKVD officers try to arrest Zhukov, followed swiftly by the NKVD officers being either detained or shot out of hand.
At this point, I can see Zhukov, Rokossovsky and Chuikov, turning around and making a drive on Moscow. Stalin either has to stand and fight, (and likely die), or make a run for it.
If he does the latter, don't be surprised if he ends up back in Georgia living a peasant life under an assumed name.
He'll be found one day though.