Easter eggs have a long and rich history in the DC and Marvel comic universes — and for good reason. Superhero comic books are among the most Easter egg–friendly storytelling mediums available. By ...

The ’90s were a terrible decade for Marvel. The publisher had some major sales successes in the early days of the decade, as Spider-Man #1, X-Men (Vol. 2) #1, and X-Force (Vol. 1) #1 sold millions.