I grew up on these comics and I have to tell you that youre in for a real treat in what marvel has coming. I would suggest googling the infinity gauntlet, thanos and even marvel cosmic universe like eternity, mistress death, the celestials.
The main reason this is a major thing to most comic geeks like myself is everything that has been going on from the tesseract, the Aether and if you look at the easter eggs in Thor 1 you can see the infinity gauntlet in Odins treasure room. Thanos is a master of deception and skilled tactician and a total mad man that worships mistress death. He eventually collects the 6 infinity gems and grafts them onto a gauntlet "infinity gauntlet". This gives Thanos master over TIME,SPACE,POWER,MIND,REALITY and SOUL. He basically can think or will something to be or not to be. in the infinity gauntlet comic book in tribute to mistress death he extinguishes half of all life in the universe by simply snapping his fingers. no one save The living tribunal can match him when he has the infinity gauntlet or Heart of the universe but that's a whole new subject. He bested all of the celestials, Galactus, Infinity, Lord Chaos and Master Order, Ego, silver surfer on multiple occasions Adam Warlock, and so many others. When he had the infinity gauntlet all of earths super heros tried to stop him but they failed miserably and this is with him handicapping himself and toying around with them. In one encounter Wolverine manages to stab him but he simply gets annoyed laughs then turns Wolvie into rubber nullifying his adamantium. And yes even the Hulk gets literally bitch slapped by Thanos. Sorry to type a book but I love comics and think Marvel/Disney/Fox is doing a pretty good job bringing it to the big screen.