I thought about this as well as all kinds of other things it could lead to, but then they also saw the Akatsuki cloaks and I'm sure every village knows that they are all renegade criminal ninjas. If the cloud came roaring at the leaf, they would at least talk about it before just throwin' jutsus at eachother.
We don't really know anything about the clouds leadership. If they are a completely war-obsessed nation then a war is deff a possibility.
Sasuke is going to be in deep dodo when Konoha finds out he joined Akatsuki.