In celebration of the release of Kingdom Hearts HD 1.5 + 2.5 ReMIX, Snapchat has a special geofilter with Riku, Kairi, Donald, and Goofy huddled around Sora in the bottom right corner and the logo in the top left corner that you can use to take selfies.

The filters are only available while you are inside Disneyland Parks and possibly Disney World as well, although no word if they will be available for the other Disney Parks worldwide. It was mentioned during the live stream of Kingdom Hearts 1.5 + 2.5 ReMIX yesterday. It's possible that the filters will only be at the Disney Parks for a limited time.

Thanks to @churroz for the tip and thanks to @elizabethapeck_, and @Sheltered_One, for the snaps of the filter.