DisneyStore Japan has Tsum Tsum festival up for pre-order and with a matching four pack Tsum Tsum Collection. Tsum Tsum festival was announced in Feb and this is scheduled to be released in Japan in October. Hopefully we will get this set released in the United States soon.
There is also a Nintendo Switch Bundle themed with Tsum Tsum festival up for pre-order and set to be released in October and only in Japan. As always, stay tuned for more information!