Only because they're keeping it to themselves. Barry can run at superspeed. That alone could have been useful against Darkh in some way. But him being called has never been mentioned. Have a very great day!I think on an episodic basis, yes. But as the overall of a season? I think it is an interesting option. The first 3 seasons dealt with just Star City and possible destruction of it. This is the first time the season has really revolved around the entire world and Oliver and his team are really the only ones with the capability and the knowledge to stop it.
God bless you! God bless everyone!