I've shown a few images from the now-rare 1980 DR. STRANGE MARVEL COMICS CALENDAR, but here is a true rarity! This is an awesome illo by George Perez (with able inks by Bob Wiacek), featuring not only Doc, but the amazing Avengers! This image references epochal events from a few years earlier, as seen in AVENGERS #61, but re-imagined by this Bronze Age drawing duo! Click below to enlarge!
BONUS! Click below to see the 1969 AVENGERS issue (with art by big John Buscema) that inspired the above calendar illustration!