Avengers, Annual #7, by Jim Starlin
Going out on a limb and saying this may be one of, if not my absolute, favorite done-in-one single issue stories.
I’m actually re-reading this this week, might even finish tonight. Expect a deluge of WARLOCK posts once I get through...
Need to read this this week.
Avengers King Size Annual!!!
There should be a Secret Wars movie
There should be an Infinity Gauntlet movie.
One of my favorite self-contained annuals.