I only know the name, but not much else of him. I actually don't have an exact link to the signing either, but I do have this:
As noted before, former Ring of Honor star Chris Hero has finally been signed by WWE. Word is that Hero's signing was delayed because he has a naturally elevated testosterone/epitestosterone level and WWE won't sign talents who can't pass the steroid test. It took months and many rounds of testing to prove that the high level was natural.