Preview:Matthias Schoenaerts is joining Supergirl.He’ll play the villain opposite Milly Alcock’s conflicted title character.‘Cruella’s Craig Gillespie is in the director’s chair.While we’ve known for a while that ‘House of the Dragon’ actor Milly Alcock has snagged the role of Kara Zor-El, AKA Supergirl in ‘Supergirl: Woman of Tomorrow,’ other news has been slower to arrive.