User blog comment:LionRed/Pirate Alliance Wars/@comment-5888163-20130301214909

I think Both Alliance would not have a war between themselves. They might have some argument or some sort of test of streght but not an actual fight. However i really would love to see them fight :(

So i think as MDM mention they would have a temporary alliance with each other if ever they are going to attack the same yonkou 1 in 4 chance. They would would ally with each other so that they can easily take down some of that yonkou's power/ally/crew. Then at the age either Law or Kid would show their true self wanting to take down that yonkou himself or atleast have the last kill.

As for the others supernova, they would either join the alliance as they don't want to feel left out and missing all the action OR they would just happened to be at the wrong place at the wrong time. they will get caught up in the fight and ending up allying themselves to the other Supernova.Or the yonkou would assume that they are ally to StrawHeart Alliance or KAH Alliance ending up attacking them leaving them no choice but to fight the yonkou and side with which ever alliance is there. (This plot or event is similar to Saboady Incident)