The script is already in progress, but the announcement of the date is still far away.
Co-creator and director of "It: Welcome to Derry" Andres (Andy) Muschietti reminded that the series was originally conceived as a story moving backward along the timeline. If the first season was focused on the year 1962, then the action of the second will be moved to 1935 and connected with the bloody history of the Bradley gang, which Stephen King wrote about in the original novel "It".
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"A Completely Different Atmosphere": The Second Season of "It: Welcome to Derry" Will Be Dedicated to the Bradley Gang
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The script is already in progress, but the announcement of the date is still far away.