Probably not to the level of killing Iceman, no, because there’d be plenty of chatter about that beforehand–solicits, interviews, promotion–so that it’d be pretty impossible to keep completely below the radar. But on occasion a storyline or story concept is put into motion that causes a problem, and then needs to be rethought on the fly. Doesn’t happen often, but it has happened, and it will likely happen again once in a while.