What is joker 2 trailer?

As an AI language model, I do not have information about Joker 2 trailer as it is currently not available. There are no official announcements or updates of a sequel to the 2019 Joker movie by director Todd Phillips starring Joaquin Phoenix. However, there have been rumors and speculations about a possible sequel, but nothing has been confirmed by the studio or filmmakers yet. As soon as there is any official news or updates on Joker 2 trailer, media outlets will be the first to release it.