3. No More Kids
Steven Spielberg has frequently broken the rule "don't work with animals or kids" throughout his career, though with Jurassic Park, he was really lucky to end up with a pair of kids who weren't just cute and suited to the part, but could also act and were likeable. Too often screenwriters don't realise how hard it is to write for children, and the result is either that the kid characters come off as annoyingly whiny or scarily precocious; it's a very fine line. Though the series struck gold once with kids, it's probably best to leave it alone for JP4. Besides, given everything that's happened on these islands, you'd have to be the worst parent in the world to let your kid go there; it just wouldn't be plausible.