Skeletor is a fictional supervillain and the main antagonist of the Masters of the Universe franchise created by Mattel, serving as the archenemy of He-Man and usually depicted as a skull-faced, blue-skinned sorcerer. From Wikipedia
The live-action adaptation, directed by Travis Knight, is set for a theatrical release on June 5, 2026, and stars an ensemble cast including Jared Leto and Idris Elba.