Do you seriously think, given what has happened, and given the current outlook by a significant number of people that our parks are still death traps, dreamworld could survive another serious incident? Even if it wasn't to kill someone, it would only highlight that they knew about the issue given someone had previously injured themselves and throw a MASSIVE PETROL TANKER full of fuel on to the fire that safety is lacking in our parks and (insert which ever catch cry you choose; torn down, government should step in, etc,).
What would happen is the press would be all over it. They would start by referencing the deaths that occurred at the park, then they would blow up the previous story about the person that nearly drowned due to stupidity and turn it into a safety issue, questioning why another one of their old rides has been left to injure or kill someone, had they learned nothing from the past? Throw in some comments about ride break downs and safety, then round off the story by questioning the government safety inspectors, did they do their jobs properly? how can this happen? which would force the governments hand to step in with whatever ill advised, spur of the moment method they choose so they can show the members of the public they take this sort of thing seriously.
Basically, the majority of the public would listen to the media reports like last time, only now, some of the people who felt the media were continuing to attack the parks needlessly after the deaths would be swayed, wondering maybe there is something to the reports after all. Not only that, but you'd force the governments hand to make a grand spectacle out of anything they did, while the park sits there and suffers, possibly going through another round of closures while inspectors go through the park again.
Short of a massive fire, I really couldn't think of anything worse that could occur at the moment.