Don't think we will change the original title... Far as I know it released as Zootopia first and as Zootropolis in some other countries (also the Netherlands, where I come from for example).

You could add it as an alt title, but in this case that makes no sense as it's already the translated title for many other countries... http://movies.disney.com/zootopia

@Esky_007: The original title is still Zootopia on IMDb (yes, I just checked). You must have the UK settings or something similar to get Zootropolis. So Marr is correct. No change.