Episode 1 is about Poison Ivy

Episode 2 is about Black Hand, It ends with his his death and the black lantern ring going to him.

Episode 3 is Captain Cold (The Flash will be mentioned but never appears as anything more than a blur)

Episode 4 is about Deadshot

Episode 5 is about Tattooed man

Episode 6 is about Cheetah

Episode 7 is about Eradicator, and fearures Superman, Gives more details on the construction of the fortress.

Episode 8 is Gorilla Grood