Great review. I always liked this book as well. I dropped out of comics a while ago, but I would still like to pick up all the other "Infinity" books..."Infinity War" (wasn't that released last year?) the Adam Warlock series, and some of the other stuff.
The plot behind "Marvel Super Heroes" was based around this game, as you mentioned. I never played it on the SNES, but I did at the arcade. You can also get the game from:
www.playagain.net
Finally, here is a good site about Thanos, and the Infinity Gauntlet.
http://thanos.crowfans.com/