Sounds like a kinder gentler Mark Millar/Matthew Vaughn film to me.
One of the things that has defined the modern era of comic book writing is the way writers these days take familiar tropes or character types and bend them in all sorts of interesting ways. Frank Miller and Alan Moore and Grant Morrison and Neil Gaiman were in the first wave of guys doing this, and in some cases, they were able to work with the actual characters and the results were something like Miller's landmark "The Dark Knight Returns" or Moore's "Watchmen" or Gaiman's "Miracleman" or Morrison's "Animal Man." In other cases, they invented characters that were similar to things we knew, and then dirtied up the icons in very subversive ways.
Mark Millar has had great success working in that vein, and in particular, he and Matthew Vaughn found it to be very fertile ground when they collaborated on the film version of "Kick-Ass." Now it looks like the two of them will be working together again, although not on the sequel that many people expected.
Instead, they're going to be bringing Millar's new series "Superior" to the bigscreen, and based on the description of it, it sounds like "Shazam with MS." I don't mean to be reductive, but the key to what makes "Shazam!" so potent is the idea of a young boy finding himself in the body of a super-powerful being. It's like seeing a 10-year-old behind the wheel of a Ferrari. There's so much potent drama in that archetype that adding a crippling illness to the equation is a very interesting complication. Our own Greg Ellwood tells me he's hooked on this book, and I'm sure I'll be checking it out now, if only to see what it is that Millar and Vaughn are cooking up.