I grew up reading the author's Warlock series reprints in the eighties. Those were masterful and powerful stories. The series climaxed with a cosmic battle involving the Avengers, the Fantastic Four, Spider-man and Warlock. If you're a teenage brat it doesn't get any better than that.
Until this story. Starlin writes this one so deftly and so utterly over the top that you walk away stunned. The premise? The dark demi-god Thanos controls the fate of the universe with his Infinity Gems. The players include X-Men, Avengers, Spider-Man, Fantastic Four, Warlock, Dr Strange. If you like to see things blow up, Starlin delivers. (The universe becomes an immense battlefield for the alien gods.) If you want to see someone at last handle the psychology of a super-villain in a convincing manner, Starlin delivers. (Why is Thanos so bad? Jim answers loud and clear.) And if you want a plot that's both formulaic but new, this one delivers. (Like Star Wars.)
I also enjoyed the Infinity War series, so I hope Marvel reprints that one.