The Demogorgon and Pinhead.
For Demogorgon, Netflix didn't renew their license with them, and for a long while, Demogorgon and the characters that came with it were just unable to be purchased. HOWEVER, they worked out a deal with Netflix and got all of them back, seemingly forever.
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As for Pinhead, the rights to Hellraiser got moved back to Clive Barker, the original writer, and afaik, he doesn't like/care enough about DBD to want to renew the license. Coupled with the Hellraiser NFT fiasco and it's all sorts of ****ed.
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