4. Erik Kirby (Trevor Morgan)
Of all the kids in the series, Erik Kirby always felt like the one character with the most potential. He certainly showed that he had the skills to survive on a dino-infested island. Not only that, he seemed to have a genuine interest in the giant lizards, showing respect and admiration for Alan Grant, his books, and his experiences from the first film. Assuming that nearly being devoured by velociraptors, pteranodons and a spinosaurus haven't put him off dinosaurs for life, I can see him pursuing his passion into adulthood. Now, in his early-mid twenties, where would Erik be? Hopefully, he'll have washed his hands of his rather irritating parents (please do not bring them back - as great as William H Macy is, we don't need a dull hardware store owner and his equally dull wife/ex-wife back in the picture). I can certainly see him following in Dr. Grant's footsteps and becoming a paleontologist, perhaps fulfilling the role played by Alessandro Nivola's Billy Brennan in the last film. And in a world that has gradually been made aware of living dinosaurs, such a thing might result in a completely different role to the one previously occupied by Alan and Ellie in the first film.
How He Might Return... If the rumours are true and there really is a theme park on Isla Nublar, I can see that Erik may have found a way to make it to the island, working with these dinosaurs as some kind of specialist. After surviving on Isla Sorna for two months, he'll certainly have some sage advice for the wardens keeping these lizards under control. And when things inevitably go wrong, I can see Erik being the man to work with our new heroes to lead everyone to safety, navigating the perils of the island with skill and confidence...