Well I think the incentive is to create grown in the business value, and then sell it to reap the cash reward.
Now growth in value, and growth in the 'quality of theme park experience' are not necessarily the same thing, so I think it very much depends on the CEO's not financial goals as to what the incentive means to them, and by extension, the future of the park.
If you have a CEO in there that's all about pocketing as much cash as possible and then spring boarding onto the next well appointed corporate gig, it's going to be grow value as fast is possible.
But if you have a CEO that's actually pretty happy with the position they have, want to stay in it long term for the lifestyle and personal interest aspects that come with it (ie likes theme parks, wants to live on the Gold Coast, etc) we're more likely to see long term material improvement in the offering from the Theme Park.
I can't speak to, and won't speculate the personal motivations of the current CEO, but I think the above factors will very much determine how we see thee companies new found cash is spent.