Re: What does this Dream indicates?
The only thing that you mentioned in your post that science can not explain is metaphysics aka imaginary science.
Dreams are related to your subconscious and represent your emotions, the state of your mind and events in your life. Mind you, current or past events. The Harry Potter dream meant only that I had Harry Potter in the back of my mind at that time.
Dreams are NOT related in any way to the supernatural (telling the future and all that other mumbo jumbo)