The Llellewyloly. The revolution will begin as the Imperium is distracted. The Marches will fall under the iron hand-leg of the dandelion.
(Silly answer out of the way, I'd like to see a Zhodani win, mostly because I'd find it interesting to see a forced rexamination of their motive on the part of the Imperium. What does the average Imperial know about the Zhodani beyond "they're the bad guy, as I was taught"? We know that, telepathic artefact business aside, the Zhodani are motivated by fear of Imperial expansion and not expansionist desires of their own (for the most part). Basically, I think a Zhodani victory would throw up more surprises in regards to how the factions relate to each other -- especially if, thanks to telepathic artefact business, the Zhodani actually *were* aggressors here, and are dealing with their disquiet over it. The Zhodani, I think, won't know quite what to do with their victory the way the Imperium would, which promises some fascinating opportunities.)