Loki

A man in a dark suit walks forward in a stone-walled hall with a large stained-glass window behind him, then the scene cuts to a close-up of the same man in a black jacket with a smug expression as text appears, followed by a shot of him lying underwater with glowing symbols, then a black-and-white image of him and another man with text, then a woman in a black suit with antler-like headgear standing in a desolate landscape, and finally a close-up of a woman with red hair looking up in surprise.