For those readers who get Previews from us, DC has informed us their June 2016 solicitations will be published in a separate "Rebirth"-themed catalog to mark the publishing initiative's launch. This will be similar in format to Marvel's current Diamond catalog, which is a separate booklet from Previews.
This standalone DC "Rebirth" catalog will be given to us next month and will be available while supplies last. According to DC, its solicitations will return to being inside Diamond's Preview catalog the following month.
DC's line-wide "Rebirth" begins with the one-shot DC Universe: Rebirth one-shot in May, followed by the launch of the individual ongoing titles beginning in June.