Ultimate Spider-Man - 2012 Sinister Six 2-6 was released on:
USA: 17 February 2013 (Release of official version)
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Ultimate Spider-Man - 2012 Return of the Sinister Six 2-25 was
released on:
USA: 3 November 2013 (video premiere)
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Websites have announced that a spin-off for the Sinister Six is
currently being planned for future release. It will be set in the
same universe as "The Amazing Spider-Man".
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There's speculation the Tom Holland Spider-Man era might
introduce Sinister Six but nothing has been confirmed.