Hopefully Arrow will find a way to do something refreshing with Tina as Black Canary 4.0.
Team Arrow is already bloated with fighters as it is; did we really need Black Canary 4.0 on top of everybody else working as a vigilante in Star City?
Yes, the hero is an important part of many Green Arrow comic stories, but Arrow has never followed comic canon exactly, and we’ve already had an overload already.
Season 1 proved that Arrow can work quite well without a Black Canary in the cast, and we’ve already sat through three Black Canarys who have used fisticuffs and a sonic pitch to subdue enemies.