digitalfreaknyc said:
I've heard nothing about this supposed AMC showing.
I posted about it on the previous page, a while back: http://originaltrilogy.com/forum/topic.cfm/Superman-The-Movie-The-KCOP-cut/post/513441/#TopicPost513441
They were showing a marathon, with what appears to have been this "KCOP" extended cut of Superman in letterbox widescreen, then the Donner cut of Superman 2, Superman Returns, and then Superman 3.