Readers of Flash comics will reemember a character named Vandal Savage who has a similar backstory. Only he was a bad guy, not the hero.
I like old fiction.
I just re-read “The Variable Man” by Phillip K Dick yesterday and was struck by how much like the world of about 100 years from now we are today.
A man plucked from pre WWI Poland creates chaos in a 2100s world where training is so specific that people can’t do anything beyond what they know.