Due to the success they had in killing off The Human Torch in Fantastic Four, Senior Vice President of sales at Marvel Comics David Gabriel announced that Marvel is planning to kill a major character every quarter. He also added "this is not a joke."
From Bleeding Cool...
Gabriel did however specify that these storylines are NOT about killing characters. What’s key is what comes AFTER the deaths. For example, after the Human Torch death, Spidey joined the team and the concept of “FF” got an entirely new focus as Future Foundation.
Hawksblueyes:If this is truly Marvels plan, I really have no idea what to even begin to say about it. I hope this is either untrue or never happens.