13 of 13Bruce Wayne/Batman
The one character many DC Comics fans would love to see is also the one who will likely never appear on the series since the rights to Batman have always been trickier. But with Christopher Nolan's film trilogy finished, everyone can still hope to see the caped crusader appear, even sans the cape. Stephen Amell's own cousin, Tomorrow People's Robbie Amell would fit right in, especially since Stephen himself has already said he should do it.
Photo By: Larry Busacca/Getty Images, DC Comics