User blog:BatmanBaleLover/What you think will be Season 5's Theme ?

In my some previous blogs, I asked, Who you think will be the main villain for Season 5. And this question was a success with over 113 comments that many users answered. Due to the success, I made another question like this. It's below :

Who you think will be Season 5's Theme ?

'''Note : If this question be success and has a lot opinions or comments, There's going to be another question. Keep share your opinion with others. :D'''