Dear Tiago Araújo,
Thank you for your question and so sorry for the late reply.
If a team uses a theme or a story from movies, fairy tails, comics and so on as a performance scenario, it will be no problem. If a team imitates the appearance of a famous character, it will not be prohibited. However, it will not get a higher evaluation than your own design in the category of creativity. Also, it may have some problems with copyright.
But your question is about a logotype, don't you? We need a little more information to answer correctly. Could you give us additional information about what kind of logotype and how will you use?