HE COULD STILL BE ALIVE!

Though he'd be 110. So I doubt it. Still:

But the skull fragment the Russians dug up outside the Führerbunker in 1946 could never have belonged to Hitler. The skull DNA was incontestably female. The only positive physical proof that Hitler had shot himself had suddenly been rendered worthless. The result is a mystery reopened and, for conspiracy theorists the tantalising possibility that Hitler did not die in the bunker.

Also, for fun:

The autopsy also reported that Hitler, as had been rumoured, had only one testicle.