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The lineup has nine different characters and 12 total figures. Iron Man gets a lot of love with four different pieces. Yes, the bulky Hulkbuster Armor is one of them. Other heroes with figures include Captain America, Black Widow, Thor and Black Widow. A Hulk figure means you can have him and Tony Stark duke it out like the trailer shows. If you've got a spot-on James Spader impersonation, Ultron also makes an appearance.
A full case is 12 units.