Slash and Chris on the same track makes the GN'R multiverse complete.
Jokes aside, it's basically the 2002 line-up minus Bucket, Robin & Tommy but with Slash & Duff.
Thats's not how Angus works. There is a difference between a studio and a live setting for example. I don't think that he would have a problem to replace Brian, Phil or Cliff on tour. That's what happened to Phil already.