The trailer for "The Acolyte" hints at Darth Tenebrous as the main Sith Lord, based on the design of one prominent ship. Tenebrous could fit well within the Star Wars timeline of the series ...

In Legends, Darth Tenebrous was Darth Plagueis' Sith master, and although next to nothing has been confirmed about Tenebrous in Star Wars canon, his Legends characterization reveals that Darth ...