There was a bring back Jean campaign on this forum quite sometime ago, and a number of members repeatedly sent off e-mails. You see how seriously they were taken. They will do whatever they please with the characters they own, and there's NOTHING you can do about it (aside from dropping the books you don't like). Honestly, if Marvel does something and a large number of people don't like it, if they dropped the books and it's enough to affect Marvel financially, then they would change direction. But they aren't going to listen to fan mail. In fact ,they don't even publish letters to the editors anymore, so in all likelihood your fan mail would simply be deleted or thrown away.