Jon Burlingame Marvel’s move into streaming with this year’s “WandaVision” and “The Falcon and the Winter Soldier” conclusively demonstrated two things: that they didn’t skimp on the music budgets, and that theme songs could generate as much buzz as the unfolding mysteries surrounding the characters.Both series turned to Marvel vets for their lavish scores: Christophe Beck (the “Ant-Man” movies) for “WandaVision” and Henry Jackman (two “Captain America” films) for “The Falcon and the Winter