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Last week, former "Sons of Anarchy" star Emilio Rivera, who portrayed Marcus Alvarez, President of the Mayans, assured fans through his social media accounts that he's going to return for the spin-off. While nothing has been confirmed, the actor seemed to backtrack on his initial statement.

On November 21, Rivera told a fan on Twitter that he isn't locked for "Mayans MC". "No, I'm not sure if I'm even on the Mayans yet," he wrote. Later, when another fan asked the actor if he's involved in the show, he answered, "Talking about it."

No I'm not not sure if I'm even on the Mayans yet, https://t.co/VMFTLd9s9R

— Emilio Rivera (@EmilioRivera48) 21 November 2016

His statement shocked fans of "Sons of Anarchy". But this doesn't mean he won't appear on the series. His tweet also hinted that the network had spoken to him about a role, but nothing has been set in stone just yet.

Talking about it https://t.co/FbQJpWDvD6

— Emilio Rivera (@EmilioRivera48) 21 November 2016

In addition to answering fans' questions about his involvement in the spin-off, the actor admitted that Marcus Alvarez is one of his favorite parts that he has ever played. He also revealed that the toughest scene he ever had was a scene he filmed for "Sons of Anarchy".

Marcy Alvarez , Big Joe in Road Dogz, Angel in never get outta the Boat https://t.co/u0vmpRdoAu

— Emilio Rivera (@EmilioRivera48) 21 November 2016

Killin my Son on SOA , Callled my Real son before doing it.. https://t.co/mFHu1aPRVe

— Emilio Rivera (@EmilioRivera48) 21 November 2016

Rivera's Marcus Alvarez is known as a vital part of the Mayans. Many fans believe the spin-off wouldn't be complete without him.