Well the beginning of the intro should always be a "hook", or something that will get people's attention, such as a quote, a surprising statistic, a question, or an anecdote (a short story). For example, you could quote an important scene from one of the movies, or a statistic of the gross incomes of both of the movies.
You could give a short summary of the movies to introduce them somewhere in the intro.
Lastly, you should have a thesis statement (main idea sentence) that is the the LAST sentence of your intro paragraph. For example, you could say "Alice in Wonderland by Walt Disney is different from the one done by Tim Burton because....." and list a couple examples that you will further expand upon in the body of your essay.
Hope this helps! Good luck
