Kotobukiya will be delaying Rarity for one month due to "unforseen circumstances" as announced over on their information page. She was originally supposed to release in April, but will be shifted to June instead. The exact message:
Dear Valued Customers,
Thank you for your generous patronage and support.
We are writing to inform you that due to unforeseen circumstances, there has been a change in the release month of the following products originally scheduled to be released in April 2020.
Thanks to Andrea for the heads up.