Ok, Slade went most likely to the phantom zone, yes the original was destroyed, maybe this was built by the fortress
Like Slade's last words, where he referenced that he was "beyond death's stroke" As the comic book, Slade is called Deathstroke
Don't see how the Chloe flashback was strange, as the little notes she has been sending people since she disappeared, and they had footage of her from an episode that fit right in. She is suppose to be in 3 or 4 episodes this season.
I wonder if they are gonna get the real actors to play Impulse, john Jones, Aquaman, cyborg and Zatanna for the next episode.