You could have them trying to keep the park open even regardless of the issues. It's now almost exclusively visited by extreme sports idiots who want to base jump and squirrel suit with pterodactyls.
Some court room drama with whether or not the park should be allowed to remain open as people regularly die. Evil/ignorant corp guy argues they are signing up at their own risk. Malcolm can show up here.
Shotty security on the island due to cut backs results in a break out and attack a nearby vacation island.
OR
Maybe one of the extreme people takes a dinosaur home thinking he can raise it like a pet?
OR
Have a purely water prehistoric park and have a Deep Blue Style issue. A breakout results in dinos entering the actual ecosystem and becoming real sea monsters.
OR
The volcano is about blow up and were going to debate whether or not to protect the animals we created.
As a premise it's not bad. Whats bad is watching Man vs Supervolcano That He Could Never Survive.
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