At first I was mad that Marvel Comics "sold out" to Disney, but then when I thought about it, it made perfect sense.
For Disney, they get the fast track to obtaining the rights to the Marvel Comics characters AND some of the talent Marvel has.
For Marvel, they get the deep pockets of Disney and greatly increases their chances of survival in a "new world" where reading of newspapers and magazines are down. My assumption is, in this new age, comic book sales are drastically down as well.
This is a good deal for all involved.