Maybe it was the crossoververse?
https://www.cbr.com/marvel-black-win...s-dc-universe/
[IMG][/IMG]
This is the second time marvel or dc has hinted at a crossover.
https://www.cbr.com/doomsday-clock-m...ssover-teased/
Some fans think marvel and dc are hinting at a crossover. Or it could just be a fun jab at each other.