Jorge Arias (in his Sin Cara gimmick) debuted at AAA’s Guerra de Titanes event.
Sin Cara was one of the most recent WWE releases, including Luke Harper and both members of The Ascension. An interesting point to made about this situation is that Arias seems to have been allowed to continue using the Sin Cara gimmick outside of the WWE.
Formerly Hunico, Arias took on the moniker of Sin Cara after the original performer Luis Ignacio Urive Alvirde, was released by the WWE. Alvirde also made a few appearances as Sin Cara outside of the WWE, but eventually took on a new identity.
It’s not known at this time whether Arias will continue to use the character. The WWE may step in if there was no permission given, as it still stands to reason that the WWE still own the license to the Sin Cara brand and still have merchandise listed on their site as of this writing.