User blog comment:Brandon Rhea/How we're testing the fandom.com domain migration/@comment-32440224-20181015162025/@comment-1038387-20181015163941

It will still exist.

The moved wikis will be just as many wikis as there are now. Wingsoffire.wikia.com would just be Wingsoffire.fandom.com. It won't be merged with any other wiki.