God. I was just thinking about Secret Invasion... and how Atum was eating everyone...
Honest to god... i think this is a lot fairer matchup than most *cough* fights recently. Thanos has the firepower potentially to take out atum.. but if atum gets close, Thanos would get eaten and fight out.
I guess what I'm saying is, what is the distance the fight is starting at. I'd give Atum 6/10 though. He has the durability to get close to have dinner.