Last time we went, everything closed at 8:00 to let regular day guests out and we were waiting a good half an hour before things opened up again. So we had half an hour of doing nothing. I wish on H2O nights, the park closed at 7:00.
As for transportation, Animal Kingdom is only for transfers to Blizzard Beach. You'll have to catch a bus to Disney Springs and transfer to Typhoon Lagoon from there. This really stinks too. The bus situation isn't very good right now anyway, but now you'll have every Disney resort guest attending that's the party converging into one location all trying to get on a bus. Luckily, TL isn't far, but I'm still glad that we'll have a rental car.