When this book was created, it certainly wasn’t as part of the Marvel Universe, which hadn’t been launched yet. But Colossus was a recurring character (twice) in Tales of Suspense, and would return again in the 1973 anthology title “Astonishing Tales,” and then finally, in The Incredible Hulk #244, would be canonized.
The origin story started in Russia, where a sculptor was forced by the oppressive state to create a massive statue. Aliens land near his house, and decide to occupy and animate the statue.
Which goes mad, breaks a bunch of stuff, then the aliens leave–and the statue remains standing still as a warning to the government to behave itself better. Which leads to a closing scene at the U.N., where the Russian ambassador deicides to agree with the one from the U.S.
Colossus returned in issue #20, where the aliens return and reoccupy the statue in an effort to achieve global domination.
He arrives on a beach in America. Great panels.
American ingenuity creates a larger, robot statue who faces off against the aliens long enough to where Colossus gets blown up.
He’ll be back, though.