Board Thread:News and Announcements/@comment-27059263-20170531183154/@comment-24264457-20170531203540

For crying out loud people, Brandon Rhea wrote: If a wiki has Discussions enabled but not Forum, "Discuss" will lead to Discussions. If Discussions and Forum are both enabled, "Discuss" will lead to Discussions while Forum will appear in the "Explore" menu. If Forum is enabled but not Discussions, "Discuss" leads to the Forum. If neither feature is enabled, "Discuss" will not appear.

This is from Community Central's "New Page and Article Headers: Official Release Date" blog. They would not put the text that I have bolded above if they were getting rid of forums. As long as the forums stay active, Fandom will not replace them until a much later date.