This isn’t exactly the biggest news, but considering the climate of secrecy around the film, an actual synopsis of the story is hard to come by in an official capacity. The very excellent Disney Infinity 3.0:
Return to a galaxy far, far away alongside new heroes and old friends as they search for a much needed ally. – FINN: A soldier on a path to adventure and danger. – REY: A true survivor who is resourceful and capable.
A much needed ally? It really isn’t a hard guess on who that is. You can construe it in different ways, but the deeper meaning is not hard to grasp.
So the “search for” plot is now confirmed. They should call it Disney InFinninity. (Okay, I’ll stop.)