If you look at how long comic books have been around, you'll realize how long this "trend" is. It's no longer a trend. It's just... how things are. You can either accept that or don't.
Disney sees the growth potential with Marvel, and maybe there's a lot of things in the works that have yet to be announced. From my understanding, comics and the toys, movies, television series, direct to dvd animation... those are all things that target not just young kids. They target the older men too.
Potentially, this is the gift that keeps on giving. $4 billion may seem like a lot if it's not your thing I suppose.