Hasbro had released Hi-Res images of most of what was revealed at Hascon. I will be going through each of these eventually (it’s been a busy few months for ML and it’s not over yet). That said, I have replaced the Iron Man and Wolverine images with better.
As to why I use the Hi-res promo images, they just look alot better. It shows what can be done with a bit of effect and paint. I also use the one with the Marvelousnews watermarked ones as I have gotten permission from the site admin, JayC, and I am a mod in the forum. This also started as a topic in those forums so there’s that as well. I have been using that site for news for years so I’ll keep on using them.