Back in the day, a Marvel Comics series containing alternate history stories of the major Marvel characters. The Watcher would introduce each tale with an account of something that happened in Marvel continuity and then show us what would have happened if things had turned out differently. The ones I remember were:
There was another
cool one I can't remember the title of, but was essentially "What If
The Thing Just Went Totally Nuts?", in which
Ben Grimm's mind snapped after he turned into the Thing and he went on a
rampage. He fought the
Hulk and had an
atom bomb dropped on him and stuff.