I'm thinking of what they could do with HIVE and Argus next year and I've got a question:
Was Mockingbird a code name the Wall used before the Secret Six comic in the 2000's brought it back as their leader's nickname?
Because I've been thinking. One line of thought for Argus and Hive is that they're both government agencies, and that the latter could try and supplant the other. In which case, presuming Waller becomes the lesser of two evils, I could see her forming a Secret Six to help Oliver.
I am very excited at some of the implications of Unthinkable's last scenes. Next season, if they do decide to adapt some of the Supermax concept, we could have an entire episode where the flashback's take place in Hong Kong while Ollie, Slade, and others try and escape the island. Imagine how much fun that would be to twist the old trope around like that!
Also, I'm kind of hoping for an antagonistic Ravager to appear like William Walsh or Wade DeFarge. Hive's back in business, and I could see one of Slade's goons having fled the city before the barricades went up, or a recovered Soloman Grundy being used to synthesize a copy of the formula. I just like the idea of a Slade powered adversary who's still a step below the man himself, who can then hopefully cross blades with him and go the way of Wintergreen. And both villainous Ravagers were known for threatening Slade's children, so if Joey comes on the show, we could see that as a plotline to justify Slade being a protagonist again.