I finally got around to reading this and was pleasantly surprised. It really is Byrne's love letter to past era's of Batman and Superman.
It really made me remember why I was such a big fan of Byrne's as a kid.
If only one of the Big Two would give him his own playground like this one to do whatever he wanted with. I am probably in the minority that would like to see Byrne on an FF or Alpha Flight series that picks up immediately after where he left the title (in the same vein as Chris Claremont's upcoming X-Men Forever).