If the balloons are among the rides, and if they are going with one of the concepts presented in the survey, then the theme must be flight. I suspect they are going to stray from that theme, though. With the other rides, I suppose some modifications could be made to fit the other themes, but with the balloons...? They just don't fit with firefighting or fireworks. Flight also would allow for a zipline of sorts from the WB tower. I would hate for them to destroy such a majestic structure when it lends itself so well to other purposes - unless, that it, there are structural issues.
That said, I think there is more room in there than people are thinking - especially if they butt everything against the train tracks on one side and the lake on the other. And I would love to see that Greedy Bros. monstrosity removed from the lake! Or are the water guns going to remain? Too much to speculate about.