Nintendo and Illumination will show the first Super Mario Bros. film teaser trailer at New York Comic-Con on October 6th at 4 p.m. ET.
The announcement was made via the event’s social media accounts.
People attending the convention will be able to see the trailer live at the Empire Stage (archive).
The film was first announced by Nintendo and Illumination back in early 2018. Nintendo then announced in September 2021 that that film was going to make its debut on December 21, 2022. However, Nintendo announced in April 2022 that the film was going to be delayed until April 2023.
[Source]: @NY_Comic_Con (Twitter): Join us October 6th at 4pm ET for the teaser trailer premiere of Nintendo & Illumination’s upcoming Super Mario Bros. film, releasing April 7, 2023 – [Archive].