Unless I missed something, the only information we have on Braum from his bio and his story is that he is just a really, really strong guy.
That can't be it. There has to be something else. No normal human being can live long enough to become a legend and a tale for at least three generations.
There used to be a popular theory about him being a watcher but it recently got denied by the release of Lissandra's and Vel'Koz's new lore.
Isn't there anything else we know about him or do we have to wait until his lore gets updated to have anything new?