Sonic Boom: The Complete Series SteelBook

Season 1:

• Trailers and More (1080p): Trailers for a hodgepodge of Sonic games, merchandise, and the feature film. Perhaps the most interesting extra here is Sonic 101 (1080p, 2:18) which offers a history of the character in games and on the screen.
  
• Concepts and Designs (1080p): A series of drawings revealing the early stages and progression of the show. Images are selected by skipping forward with the remote's chapter forward button.

Season 2:

• Trailers and More (1080p): There are some different trailers here compared to season one. Most are for various Sonic games, like Sonic Mania and Sonic Colors: Ultimate, but also for Super Monkey Ball Banana Mania, another Sega property.
  
• Animatics vs. Final (1080i): Early conceptual storyboards and animatics appear on the left-hand side of the screen, juxtaposed against the finished product on the right. Included are It Wasn't Me, It Was the One-Armed Hedgehog (2:37), It Takes a Village to Defeat a Hedgehog (3:30), Vector Detector (0:55), Sticks and Amy's Excellent Staycation (1:26), Eggman: The Video Game Part 1 (2:17), and Eggman: The Video Game Part 2: The End of the World (2:54).