I am in the process of creating a startup, and want to send a technology flyer to potentially interested business customers. It is far easier to explain why my technology is beneficial if I can example existing products that don't use it with an image, allowing me to explain the negative aspects of these products that I can improve upon.
Does this constitute fair use? My problem is that no company would give me permission to use their images to negatively describe their product, which makes it difficult to show where I can be of benefit. Could one argue my reuse is a critique of these existing products, and is therefore fair?