But it's certainly reasonable. Kids like to be separate from adults in interests and culture, reveling in the modern while rolling eyes at the aged fads that adults have a bit more trouble (or less interest in) letting go of.
Creating a brand that meets the interests of young people is a delicate business, one that is limited to the elementary education of its intended audience, and also the more optimistic tone that children respond to, but still different enough from that which has existed prior to allow for that generation separation in identity from that which modeled its adults, an essential facet in growing up for all children regardless gender, nationality, etc:. Essentially it's all the same thing (bright colors, cool animations, and some sort of collectibles merchandise that bleeds mum and daddy's bank-account); but it's not the thematic similarities that matter, but instead the exclusive separations between them. And often, it is those differences which baffle the increasingly planted-minds of adults but make perfect sense for children that are most important to a youth franchise succeeding or not.