Marvel Comics has always loved poking fun at DC. The two comicbook studios have been in competition with each other for decades and while they've both supported each other's endeavors, the two can't help but fire a friendly shot at one another from time to time.
The Hollywood Reporter has just recently dug up a 1977 interview the publication had with Stan Lee and in it the comicbook legend explains that Marvel used to make fun of DC so much for trying so hard to "catch up."
"They're doing the best they can, bless their innocent little hearts. We used to have a lot of fun with them when we started outselling them. And I know this because we have friends who work for that company and we'd get these reports. They'd start having conferences: how come Marvel's selling so much better? They studied our books, and they'd say, ‘You know, I noticed they use a lot of red on their covers. Maybe that's it.' And they would start putting a lot of red on their covers. The minute we would learn of that, we would take all the red off our covers. And our books still sold better, and that would drive them crazy."
"It never occurred to them that we take the work a little more seriously and maybe we have a little bit more of a sense of humor. And maybe people don't like things that are a little bit stuffy. They like things that are a little bit whimsical or humorous, but don't you go telling that to DC. That's just between us."
Fans have probably had the same thoughts on the whole rivalry between the Marvel Cinematic Universe and the burgeoning DC Extended Universe, however while rabid supporters from each side continue to go at each other's throats, Marvel and DC have been showing a lot of support towards each other. Still, a little friendly banter isn't all that bad.