Yes, there's a good deal of chaff in the wheat at Kickstarter. But the wheat has been so good, it's worth wading through the chaff to get it.
Yes, Marvel has made decks with USPC. DC probably has as well at some point. But you're talking about licenses own by BIG companies - Marvel's owned by Disney, DC is owned by Warner Brothers. They carefully manage these properties. Rather than giving permission to some kid to make a deck based on their intellectual property, they'd simply make one themselves using the same artists that work on the comic books. If your art was really good, they'd hire you to do it, perhaps - but it would have to be utterly stellar. No way they'd bother with Kickstarter - and that's how it should be, because Kickstarter is about getting little companies off the ground, not giving big conglomerates yet another place to hawk their wares.
There's nothing out there stopping you from making a deck based on your own superhero concepts. But for the deck to generate interest, you'd probably need to base it off of some kind of story, novel, comic book, comic strip, webcomic, etc. Webcomics would be the cheapest and easiest venue to work with to generate a following for your character, but remember that it will take time to develop a following large enough to support the creation of a deck - you'd probably sooner create "graphic novel" collections of your online work long before you'd make a deck of cards. (And that, too, could be a Kickstarter project, since it's been done before.)
I'm moving this topic to Design/Dev. The Plethora is more for actual decks hitting release than it is for discussions of a possible deck design.