The Flash Season 2 Finale: 10 Big Questions We're Asking After 'The Race Of His Life'
8. Could Zoom Become Black Flash?
After Barry defeats Zoom, he doesn't kill him but instead waits and allows the Dementor-esque Time Wraiths to come and take him away.
That means that he isn't actually dead (or at least, it's left open for a return in some capacity), and also his appearance starts to change: more colour appears on his suit, while his face becomes disfigured and starts to pull away and reveal his teeth. It looks, in short, like the Black Flash.
That's a character from the comics who effectively serves as a Grim Reaper for speedsters, his arrival signalling their impending death. With Zoom being taken into the Speed Force, could he return to fulfil that role on the series?