Below is the translation from the official Japanese Godzilla site.

April 25 from Friday, theater Advance tickets released movie "GODZILLA" (25 published Jul.)
you will start! When I have you purchase an advance ticket theater, to 30,000 people nationwide total limited first-come
present the US design Double-sided poster! Regard to the limited quantity first-come-first-served basis, please note that when the end of the gift. Please contact the nearest theater for more information.