[Found] Boom Studios Free Comic Book Day 2019 # 1

Writers - Greg Pak, Jordie Bellaire
Artists - Ethan Young, Dan Mora, Serg Acuna
Colorists - Wesllei Manoel, Doug Garbark, Raul Angulo
Cover - Greg Smallwood
28 pages

This was already in Core as: “Free Comic Book Day 2019 (Welcome To The Whedonverse)” however, I added your better image. You should be able to scan that barcode.