Two first-time showrunners who landed TV’s biggest series give THR a behind-the-scenes tour as they navigate challenges even scarier than Mordor — from "patently evil" online trolling to massive industry expectations.“This is where everything happens,” says showrunner Patrick McKay. “The War Room.” The large, windowless room’s centerpiece is a lengthy conference table, but your eyes are immediately transfixed by what’s covering the walls. You’re surrounded by concept art laying out major set pieces for The Lord of the Rings: The Rings of Power season two. Showrunners McKay and J.D. Payne give a walk-through of the sequences. They plan to introduce...