Envision a high-stakes showdown within the sprawling, technologically advanced corridors of Stark Industries. Iron Man, equipped with his latest red and gold Mark armor, stands poised with a determined glare, his suit humming with the power of new, experimental energy sources. Directly opposite, Ultron, in a form that mirrors Iron Man's design but with a darker, more sinister twist featuring sharp, metallic features and glowing red eyes, exudes a chilling presence. Both characters are surrounded by an array of Stark's inventions and Ultron's robotic minions, hinting at the technological prowess each possesses. The entire scene is underlit by the cool, clinical lighting of the lab, punctuated by the harsh reds emanating from Ultron and the warm golds from Iron Man, creating a vivid contrast that highlights the ideological battle between creator and creation, each ready to prove their supremacy in a battle that could reshape the future of technology.