Each "piece" acts as a physical key to unlock a specific digital world with its own missions and story.
: A separate piece featuring a Spider-Man symbol being consumed by the Venom symbiote. It allows you to play through the Manhattan-based Spider-Man storyline.
The "good piece" you're referring to is likely the piece . This translucent blue sculpt of Avengers Tower is the core component that unlocks the primary story campaign in Disney Infinity: Marvel Super Heroes (2.0 Edition) . Essential Marvel Play Sets
Community members often debate the value of these physical pieces versus the digital content they provide.
“All the Avengers Figures (including Hulk, which will be released later than the game itself) and a special collector display for the complete team... I need this.” Reddit · r/Disney_Infinity · 11 years ago
“I was glad to see older toys such as the maze pieces receiving new pieces which allowed for a bit of change... the toybox is a shining beacon of hope that is sure to keep you and your friends playing for hours to come.” GameLuster · 11 years ago Compatibility and Value
: Included in the Starter Pack , this piece features a crouching Hulk base and unlocks the New York City-based Avengers campaign.