That will never happen. First and foremost because comics are simply too expensive for kids.
Its not like the 70's or even the 80's when children could go out and buy a pile of comics for pocket-money prices. The current $3.99 price tag is prohibitive, especially when you consider big events or how many titles link into each other, and the fact that Marvel is deliberately marketed to entice you away from just picking up one or two books a month.
With so many different things to spend money on nowerdays, there is no way that kids are going to blow their allowances on comics. Hell, a drug habit would be cheaper.
Secondly, comics are not suitable for children. The age of innocence stopped in the 80's, and pretty much since Alan Moore got his grubby little hands on the genre comics have been about politics, death, violence, crime and sex, and despite their bright superhero colours Marvel is no different with its content.
I genuinely believe that the comic-reading audience will remain relatively small with big events such as Secret Wars having very little effect upon overall readership numbers.
The dream of reeling in millions of movie-goers will never come to pass no matter how much Marvel try to change their comics to reflect them because you are talking about two entirely different audiences and its a case of never the twain shall meet.
My mother watches movies. My grandmother watches movies. Very small children watch movies - but none of them will ever develop a strong comic reading habit for a variety of reasons, some of which Ive listed above.
I firmly believe that the current readership is Marvel comics most valuable resource, and instead of alienating them with crack-pot ideas and big event after big events, they should try listening to them once in a while - because thats whats been missing for years. When was the last time you heard Marvel come out and admit they changed something because FANS demanded it?
To cite just one example, when Marvel got rid of Nick Fury they admitted it was because fans of other media would find it confusing *if* they were to pick up a comic book. No mention at all of what the peiople who actually buy Marvels comic books want...
This isn't exactly true.
American teenagers spend $100 billion per year (their own money*), at about $5000 each. This isn't "necessities." It's nearly all disposable income. That's about $400 per month for comics. But they're not. They're just finding lots of other things to spend money on. Why? Because comics are not popular things to be interested in. They're a niche, and they're likely to remain this.
Kids under 13 are directly spending $11 billion (their own money*), but are influencing their parents' spending for a total of about $165 billion per year. That's tons of comics too.
*The money mommy and daddy give them to creep around malls and stuff.