Ever since we first met John Diggle way back at the start of Arrows run, one of the few constants in his life has been that his brother Andy was dead, killed by Deadshot at the request of H.I.V.E. So, when we found out in Brotherhood that Andy was still alive, it was a huge shock to both John and to the shows viewers. Whereas other characters have died and come back from the grave, it was revealed that Andy never actually died at all. In fact, he was essentially a crime lord of sorts rather than the war hero that we were all led to believe. The present-day Andy Diggle is a man with no remorse, no care, and not even any affection towards his wife, son, or his heartbroken brother. How things play out for the Diggle brothers going forward remains to be seen, but Andys return was a huge curveball and one of the biggest shocks of the series to date when he was unmasked by John.