They would have taken over, If shishui had his ms available, He could ka any strong important shinobi to fight for their side.. such as the third or kakashi..
The village owuld have been in an utter mess however.. totally destroyed from war..
And if the strongest village was in that state
there is NO DOUBT, a war would start....Wars start from ANY imbalance in the villages..
The third kazekage ALONE dying , Caused the fourth great ninja war.... The strongest village having a civil war would start that IMMEDIATELY....
With weakened forces , The uchiha would eventually be defeated.....Tobi would take naruto in all the chaos lol, etc etc
in the end they would have killed themselves out... They wouldn't be able to fight off a war themselves... and they already lost people in the civil war.. so there isn't really anything they could do.... any of the villages would slaughter them, Especially when villages had jinchurikis like yagura etc to fight...