The feud between Marvel and DC started back in the mid 1900's around WWII, DC was the top comic book seller of it's time soon after other comic book companies started to copy some DC's caracters mainly superman because of his incredible powers. Soon after that time period of new heroes more and more kids starting reading comics. Soon kids became the main consumers of comics, so in an attemp to make comics apeal more to kids DC started implimenting sidekicks in their comics. Many other comic book companies followed this trend. The biggest of these new competeing comic book companies was Marvelous comics. With this struggle between the two to make the best apeal to kids their feud began.