Plot Summary: Continuing on his now legendary adventures of awesomeness, Po must face two hugely epic, but very different threats: one supernatural and the other a little closer to home.
Starring: Jack Black, Angelina Jolie, Dustin Hoffman, Gary Oldman, Jackie Chan, Seth Rogen, Lucy Liu, David Cross, James Hong, Michelle Yeoh, Danny McBride, Bryan Cranston, Mads Mikkelsen, Rebel Wilson
So, based off this info, I put two and two together, and formed a theory on the plot.
Notice how Gary Oldman and Danny Mcbride make an appearance in the cast. Gary Oldman, as you may or may not know, voiced Lord Shen, and Danny Mcbride voiced Wolf Boss. Then notice how it says Po faces two threats: one supernatural, and one a little closer to home. And you can see, too, that there are three new voices that appeared in the cast, obviously: Bryan Cranston, Mads Mikkelsen, and Rebel Wilson.
So, here's my theory: Shen and Wolf Boss will make a supernatural appearance. However, I don't think Wolf Boss will be