The spinoff in question is The Flash. Barry Allen the fastest man alive who protects the streets of Central City is the latest and greatest Superhero TV show today.
Episode 1 of this new series gave us a lot of Easter Eggs with the biggest one showing a jail cell busted open from the inside with a nameplate of Grodd.
The original Black Canary (Sarah Lance) has died and now her sister will soon pick up her role as the Canary and below is a new picture of her uniform. I like this outfit more than what her sister wore in previous episodes: