Certainly possible that elements were AI generated. However, this image feels like it had someone putting polish on it. The symmetry - both in the setting and in the focal point of the image - plus the sharper color contrast particularly between the red of Mt. Doom and the blue of the mountains and the way that you get a real sense of light coming directly from the volcano and radiating out into the rest of the image. Someone definitely had their hands on this in a material way, even if it was just moving clip-art onto a canvas and tweaking the colors a bit.