User blog comment:Brian Linder/Introducing the Fandom Official Community Partnership Program/@comment-29522542-20190718004247/@comment-24006128-20190718014007

With Project Crossover, we have generally been letting communities self-organize their moves, with us there for support and data when they need it, as well as the final execution of the staff-required actions when they make the move. To my knowledge, the only Crossovers we've primarily driven ourselves have been ones where one platform no longer has a community for their wiki.

Zelda and MTG are great Crossover examples.