James Gunn's "Superman" has reintroduced the Man of Steel to a new generation, and kicked off the new DC Universe in earnest. The film contains several hints about what we can expect from Gunn's interconnected cinematic world — some more subtle than others. It also contained a similarly hard-to-spot easter egg that hints at the impending appearance of Nightwing. Well, aside from being a deep cut from DC comics lore, it also happens to be the favorite drink of Dick Grayson, the original Robin who eventually takes on the name Nightwing. Well, not exactly, since Gunn has already confirmed an animated movie focused on Dick Grayson and Jason Todd is in the works.