You may be looking for one of the following roadmaps:
- Wikimedia Foundation Annual Plans - Current and historical
- Deployment calendar, showing the next few weeks of scheduled releases and deployments to Wikimedia Foundation wikis (aka, "production").
- MediaWiki 1.39/Roadmap, schedule of when Wikimedia development branches are cut and deployed to which wikis. Also contains links to detailed changelogs for each branch.
- Version, download alpha, beta and stable versions of the MediaWiki software.
- Version lifecycle supported and end-of-life as well as policies.
- Scrum of scrums (until 2021), a weekly meeting between Wikimedia Engineering teams. See also their meeting notes and dependency wall. (see "Scrum of scrums" on Wikipedia)
- MediaWiki Stakeholders' Group/Tasks/Feature wishlist
- All pages with titles containing "roadmap"