Do we still need antagonists or villain like characters? I have an idea for one if we still need one.  

The idea I had is a puppet jutsu user, that uses human puppets like sasori, but is making puppets out of major clans in the leaf. Human Hyuga puppets, sarutobi puppets, etc.  Making several dozen puppets, wanting to steal the body of the First Hokage of the AU and turn it into a puppet.  The goal of this guy/girl could be wanting to create an army of puppets to go up against the great nations.  Trying to take advantage of the winter to gain power, or something like that. The Human puppets concept in Shippuden is very simple.  Create a puppet out of a person who was alive at one time and have a weapon with the strength of that person with various weapons in them. 

This would make a villain that is doing something that the AU Leaf would rally against.  Not only doing disgraceful things to the big clans of the leaf but with a very villainous plan way of doing something as well.   I would think someone mutating bodies of former family members/clan members would be something that would get people to rally up against for revenge.  It has all the makings for a great antagonist.  This was just a little idea I had.