Carson Burton Obi-Wan and Darth Vader are back together for the first time since 2005.Ewan McGregor and Hayden Christensen return their iconic roles from the “Star Wars” prequel series in the new Disney+ limited series “Obi-Wan Kenobi.” For the stars, it’s been a long journey since the prequels premiered.“For the response not to be rosy when they came out, was hard. It was hard,” McGregor told Variety’s Marc Malkin on the red carpet at Star Wars Celebration in Anaheim on Thursday.