I think maybe if she supported Trotsky over Stalin, and as a result Stalin gets purged, then maybe. Big if though. I don't know much about her but from what I read she was seen as somewhat submissive, which doesn't help her win many fans in the Party. But I do think if you had no Stalin and Trotsky took over you'd have a period of turmoil with a handful of leaders coming and going every few weeks up untill WW2 (sort of like a lot of Latin American countries right after independence, like Mexico, which had 6 presidents and an emperor between 1822-1824). I could see her emerge in in that scenario and then perhaps a second allied intervention while she is in power (this time with more force) that has the unintended effect of stabilizing the Party around her. Or Hitler decides that Russia is ripe for the picking and invades a few years earlier, which might have the same effect. But IMO, these scenarios are doubtful. I have a hard time imagining she would emerge under any situation.