World's Finest is slightly confusing if you hadn't read the Mister Terrific comic where Power Girl/Karen Starr had a little something going with Michael Holt/Mister Terrific and she basically stole some technology of his so she can possibly go back home to Earth 2. At the end of the Mister Terrific series he ends up being presumably sent to Earth 2 and the 2nd issue of that series will concentrate on his fate.
I read the Huntress mini mainly because I read almost anything with a tangential connection to Batman. The series did seem like a regular New 52 mini for the entire thing until the last 2-3 pages where they tacked on her friendship to Power Girl and how they're both really from Earth 2 which left a bit of a bitter taste to me as I thought the Huntress mini was really good. I'm glad to see Paul Levitz writing Worlds Finest though as he also wrote said Huntress mini.

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