The reason why this trailer has a September 2020 date is because that's the release date for a particular pair of countries (Australia/New Zealand, and some other various countries) and this trailer was released from Paramount's Australian YouTube channel.
Release date confusion aside, I adore the animation in the trailer. Everything looks so crisp, fresh and colorful. I can't wait to see the movie, hoping that it's safe to see it. Also, the movie got its PG rating from the MPAA today (for rude humor, thematic elements and mild language.. nothing new here).