Do we know what really happened behind closed doors between Brian and Angus? I've heard reports of Brian being basically dropped without notice, but you know how the media is, always blowing things up to make a story.
If true, it's definitely kind of a bummer. To come in after Bon Scott, then get booted just as fast after all these years, could make Brian feel like just another fill in vocalist. Which he shouldn't, because I would argue that the band was just as successful with him, probably even more successful. People can "what if" about if Bon was still with the band all they want, but the fact remains that AC/DC still kicked major ass with Brian.
All that being said, maybe there's more to the story. And, maybe Angus was really doing Brian a favor, knowing he would do the shows even if it wrecked his hearing for the rest of his life.
I'm just glad I saw them on the Black Ice tour, when it was still the real deal, with Malcolm and Brian. One of those bands I would've kicked myself for not seeing.