The ship going to JP i says Isla Nublar which is the island from the first JP. The director tweeted that JW is a sequel set 22 years after the first. From what I've heard about the hybrid(called a D-Rex) is that it's a T-Rex crossed with DNA from an anaconda and a cuttlefish. The hybrid is due to people getting bored with the same ol' dinosaurs. We're seeing the park after years of success.
I think it would be awesome to do a chameleon/dino hybrid that could be seen in a kinda when-you-see-it-you'll-poo-bricks style where someone is staring at you somewhere you can't see. Those get me all the time. I hate the thought of someone looking at me but I can't see them. So when you view the movie again you can spot glimpses of the dino when the main characters aren't paying attention. Scary!
From the looks of the trailer it looks like they've trained at least the velociraptors because it doesn't look like they are chasing after Chris Pratt and he doesn't seem concerned with them at all. Looks like they may even race them given the gates they jump out of.
Here's a piece of concept art that some say is the D-Rex.
But I think the quickest way to ruin the JP movies is to add dino/human hybrids. Leave that for another movie. It has no place in JP.