Iron Man from Black Sabbath

I am Iron Man Has he lost his mind? Can he see or is he blind? Can he walk at all Or if he moves, will he fall? Is he alive or dead? Has he thoughts within his head? We'll just pass him there Why should we even care? He was turned to steel In the great magnetic field When he traveled time For the future of mankind Nobody wants him He just stares at the world Planning his vengeance That he will soon unfurl Now the time is here For Iron Man to spread fear Vengeance from the grave Kills the people he once saved Nobody wants him They just turn their heads Nobody helps him Now he has his revenge Heavy boots of lead Fills his victims full of dread Running as fast as they can Iron Man lives again

a man who travels into the future and sees the apocalypse. In the process of returning to the present to warn the human race, he is turned into steel by a magnetic field and his attempts to warn the public are ignored and mocked. Feeling shunned and alone, Iron Man plans his revenge on mankind, causing the apocalypse seen in his vision. He is liked to the Hammer horror films in the 1960s and magazines such as Man, Myth and Magic, but I had a few supernatural experiences as a child and dreams that came true and that, more than anything, shaped my interest in the occult. What I always attempted to do with my science-fiction plots was to make these relevant to the modern world at the time, so I brought war and politics in. It was also an era when the whole issue of pollution was starting to get attention, and this affected my thinking quite a bit.

"like a big iron bloke walking about", with "Iron Bloke"