Composite photo in a gym setting. Take the bearded man with short blonde/light brown hair wearing an oversized bright blue t-shirt and black athletic shorts from the second reference image, and seamlessly add him standing naturally alongside the group of men (the Avengers actors: Mark Ruffalo, Chris Hemsworth, Robert Downey Jr., Chris Evans) in the gym from the first reference image. Match the gym lighting, shadows, color temperature, and realistic group selfie/photo composition perfectly so he looks like a natural part of their workout group.
