Spoiler Warning: The following article contains major spoilers for "Batman" #10 by Scott Snyder with art by Greg Capullo on sale today.

The latest installment of DC Comics' fan-favorite "Batman" series by Scott Snyder and Greg Capullo hits stores today, featuring a mythos-changing revelation from the creative duo. "Batman" #10 continues the "Night of the Owls" saga, and as the storyline rockets to its conclusion, surprises are expected by longtime fans and new readers alike.

Bruce Wayne, an orphan from an early age and a character utterly defined by his dearth of blood relations outside of the relatively recent introduction of his son, Damian, has a long-lost younger brother. In today's issue of "Batman," Snyder and Capullo face Batman off against a foe who claims to be the Dark Knight's long lost younger brother.

Thomas Wayne, Jr., born several years after Bruce and named after their father, has apparently remained unseen thought Batman history as he was sent to Willowood, Gotham's premiere children's hospital, after an accident during his birth. This isn't the first time the character has been pushed up against Batman continuity. For years, readers have interacted with Owlman -a villainous double for the Dark Knight from the alternate universe called Earth 4 -who also claims to be Thomas Wayne, Jr. Not to mention the fact that a background story similar to the one sold by Batman's new villain appeared in a pair of mid-1970s "World's Finest" stories by Arnold Drake where he returned as the villainous Boomerang Killer. However, that story has always been treated as unofficial to the Batman canon

"Batman" #10 is the penultimate installment of a long-building story by Snyder and Capullo, and its turns may only scratch the surface of what's in store. Could the villainous Talon's revelations be a ruse? Could he actually be from an alternate universe?

Later today, CBR News will present an interview with Snyder on this very subject, but for now, readers are left feeling like the Wayne family just got a whole lot bigger.