I think the idea that the kids match up to individual heroes is very likely from their outfits and their poses. I also think that it is probable that the token girl would match up to the token girl superhero because the image overall makes it look like the show would use those predictably gendered roles. The boy characters are all in "action" poses while the girl character is in a "cute falling or bouncing pose."
Here's the deal, I'm the best there is. I wake up in the morning and I urinate excellence. And nobody can hang with my stuff. I'm just a big hairy American winning machine.
I'm very humble, too.