Yep, he should be on shortly.
I already regret picking Dragonite. I was going to pick Frog Ninja but I felt rushed by LCynic and my head started spinning so I needed to go lie down and have a cool sip of water and put a wet facewasher on my forehead. After I stopped feeling flustered I felt sad because I want Frog Ninja.
If Greninja gets taken before your next turn you could always trade for him after the draft.