Inside Out.

Or...

I like this poster better :)

1

This movie will literally show you what is inside you.

Train of thought. 

What is the train of thought? 

What is its relation to the conscious, subconscious, emotions, memories?

www.pixarpost.com/2015/01/Train-of-Thought-Concept-Art.html

Imaginary Friends. What an imaginary friends? Why do they exist? Where do they go? Why are they so strange?

Stages of psychological development.

Subconscious trauma being created.

Resulting phobia.

Subconscious forgetting.

Memories. Long-term memory storage. Forgetting.

Main Driving Emotions - Joy, Sadness, Fear, Disgust.

Values. 

Drivers.

How phobias are formed.

The nature of imagination.

Self-talk.

Dreams.

If you look deep enough, there is so much detail. These are the ones I know. I'm sure there's more. 

Read in between the lines, because the movie presents a model of the human mind, but models are never the real thing. The truth lies in both what the model does and does not describe, and it is by filling the gaps that we discover.

2

This is no children's movie. As with many Disney/Pixar movies, it is about deeper themes. 

Disney knows more about how you and I work than most of us.

3

What people think about the movie reflects their understanding of the mind.