This is what the complete set will look like, you can find more specific details in my previous post.
If you order from the following stores, you will receive these bonus items:
Animate: Acrylic Keychain featuring the new digipak art
Sofmap: A3 sized (11.7 × 16.5 inches) Clear Poster featuring the new digipak art
HMV: Clear file folder featuring the new digipak art
Animega/Bunkyodo: B2 sized (19.7 × 27.8 inches) Wall Scroll featuring original vol 5 cover art
CD Japan: A2 sized (16.5 × 23.4 inches) Cloth Poster featuring original vol 4 cover art
CharaAni: B2 sized (19.7 × 27.8 inches) Wall Scroll featuring original vol 6 cover art
KING e-shop: Photoprint Set
Unfortunately if you live outside of Japan you will have to use a proxy service to order from most of these stores. Currently only CDJapan and HMV over shipping for overseas buyers. However, there are other stores you can buy from that do not have store bonuses but offer cheaper prices such as Amazon.jp and Amiami. The good news is that ALL stores will include a free B2 sized advertisement poster while supplies last. A sample image of the poster hasn't been released yet, but it will likely be similar to the 2016 Live poster that simply features the cover art;
The release date for the boxset is March 29th, Pre-order soon to make sure you get yours!