I have read the first two comics in the new Batman, Incorporated and find myself scratching my head a lot at apparently existing characters (Goatboy? Leviathan? Dead Heroes Club? And that's just #1) that aren't explained. There's even a beholder on the cover of #2! WTF!
Are there some previous Batman or Batman, Incorporated arcs that I should be reading before the new series in order to make more sense of this all?