What does the Lego Star Wars trailer do in Wars?

It's not entirely clear what you mean by "what does the Lego Star Wars trailer do in Wars?" Could you clarify your question?

Do you mean:

* What role does the Lego Star Wars trailer play in the Star Wars franchise?

* How does the Lego Star Wars trailer use elements of the Star Wars movies?

* What is the impact of the Lego Star Wars trailer on the Star Wars fandom?

Once you provide more context, I can give you a more specific and helpful answer.