Iron Man, Vol. 1 #51 (1972)

Now Stalks The Cyborg-Sinister!
After a failed attempt to launch a weather monitoring satellite, Tony and Marianne have a falling out, as Tony refuses to listen to the reason Marianne left him stranded unpowered two issues ago. The Cyborg-Sinister formed from the former Adaptoid tracks Iron Man down in his plant, where Marianne recognizes her vision unfolding in front of her. Eventually, the vision plays out, but Iron Man's jets do not fail, giving Iron Man the opportunity to finally stop the Cyborg-Sinister. Afterwards, Marianne still doesn't understand what's happening to her, and Tony doesn't seem to give it a thought as he celebrates the successful launch of his weather satellite.
Release Date: 1972