Problem I'm finding is that regardless of the siblings midara and 1st had, it is going to turn out like this:
Hey we are fighting a war. Why? BECAUSE!!!.
But war is wrong!? Why must we fight? Lets make peace!
Wait, you can do that?! Oh ok.
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Naruto being clan based, means all "wars" don't share the same effect they do in modern times(well for the last thousand+ years actually). A small clan of shinobi can request peace but it seems like the reason of war should very well be outlined. Do they just hate each other? why? Just because they kill each other? That seems pretty stupid. I hate so and so because they killed so and so because we killed so and so. Its a cycle but its more along the lines of gang violence than ninja.
All in all i feel as if Naruto is going down the "stupid reason for war so lets have peace instead" path. Which is funny because they obviously fucked over the uchiha after the war anyway.