On the World of Warcraft: Shadowlands Developer Update stream, executive producer, John Hight, revealed the collector’s edition for the expansion!

The front of the box shimmers, which you should check the stream out for. The spine has full colour covenant emblems. The art book likewise is also full colour, definitely one to look out for to see the other concept art and team vision they have for the expansion. The World of Warcraft: Shadowlands collector’s will also include a mousepad, and last but not least, a collection of pins for each of the covenants.

• Covenant Sigils – Four-Pin Collector’s Set: Add the symbols of all four Covenants to your pin collection and adorn your backpack, lanyard, or clothing with the sign of your chosen path.
• Art of the Shadowlands: Explore the visual development of Azeroth’s multifaceted afterlife through this hardcover book, and learn about an aspect of the Warcraft universe that has been little explored—until now.
• Shattered Sky Mousepad: Witness the moment Sylvanas shattered the veil between this life and what lies beyond, changing Azeroth’s fate forever.
• Collector’s Edition Digital Soundtrack Key: Download the stirring orchestral pieces from the Shadowlands soundtrack, the perfect mood music to explore the realms beyond the veil.

There will also be in-game items:

• Ensorcelled Everwyrm mount: Set off on your next adventure on a supernatural being of pure anima.
• Anima Wyrmling pet: Explore the afterlife alongside your new companion.
• Vestments of the Eternal Traveler: Use your Everwyrm to begin a quest for the Vestments of the Eternal Traveler, an all-new transmog set.   
• Wraithchill cosmetic weapon: Unlock a chilling new cosmetic effect for your weapon. As with other Illusions, Wraithchill can be applied only to certain weapon types.
• Eternal Traveler’s Hearthstone: Return to your Hearthstone bind location with a reality-bending cosmetic effect.
• Shadowlands-Level Character Boost: Instantly boost a single character to be ready for Shadowlands-level content.

Find the full details here.