Please know that not all in-development listings on IMDbPro last forever. While many titles eventually get produced, some titles are removed from the site for various reasons. Projects must be in active development, as stated in the official guidelines:
https://help.imdb.com/article/contribution/industry-professional/in-development-titles/GSTGYXUHJKVJLLU2#
For example, the title When We Pray (https://www.imdb.com/title/tt12032700/reference/) was first announced on March 17, 2020 (https://deadline.com/2020/03/jamie-foxx-directing-when-we-pray-film-1202885764/) and is being listed on IMDb more than three years (https://web.archive.org/web/20221017133121/https://www.imdb.com/title/tt12032700/) as "in development" that could be hardly recognized as an active development.
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