Disney Films Mystery Pin Collection
The new Disney Films mystery pin collection was released at Disney Parks today on May 11, 2017! Here is a look at the front and back of the box.

Disney Films Mystery Pin Collection
It is a limited release pin collection with limited edition chaser pins. The chaser pin is the same as the limited release version, except the limited edition version is black and white. All chaser pins are limited edition of 600.
It was released at Disneyland® and Walt Disney World® Resorts.
Here is a photo of the complete set of pins:

Disney Films Mystery Pins
Retail price is $16.99 per box and includes two randomly selected pins.
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-Disney Pins Blog
Photo credit: tower_of_pins on Instagram
…and they sold out by 130pm
As of Sunday, May 14th, they are still available at The Darkroom pin store.
They have been released again in February 2018. However there seem to be very few black and white chaser pins . My husband and We collected many during the first release and the black white pins were just as abundant as the color. Now, after buying many more packs we have only come across a select few of the black and white pins.