To answer someone's question about "what if" comics....Some are excellent, others are not. I have a "what if the Silver Surfer possesed the Infinity Guantlet" and it's one of my favorite comics.
I don't remember but i think he basically zooms by Thanos when his hand is cocked back to deck Captain America's shield and takes it straight off his hand. Then he's brought before the Living Tribunal and i forget what happens...i think he snaps his fingers and eliminates all of the Cosmic Beings or something obsurd....still a good comic.