The tag implication #63018 zistopia -> alternate_universe is pending approval.
Reason: It's a popular Zootopia AU based on the original scrapped plot of the movie. There's already precedent to imply these tags to alternate_universe, the Undertale AU tags already do.
Dunno if it being based on a scrapped plot changes anything here. I removed the like... 3 posts that I saw that were specifically concept art and not fan AU stuff, since it shouldn't really have been tagged with this in the first place.