I was checking some other boards and here is what I have found other teams are doing. I hope it's ok to post this here.
Animals (Parrots, Hippos, Ect.)
Team SMALL WORLD
Team Wonderland -- Looks like alot of rooms, mostly Tea party
There were some more, but not much detail. Not many pirate themes. I think we should remember the WATERSLIDE is most important. We don't want it to be too much like the River rides.
Alot of teams are wanting the teams to be in matching outfits too.
Just something to be thinking about.