After going to all the Disney parks recently for all of the Christmastime offerings, I have to say Disney hasn't really lost it. They're not rapidly expanding, but they're still a very high-quality theme park experience. Especially during Christmas...there is nothing comparable to the Candlelight Processional. Universal is more of a rides park and Disney is more of an "experience" and I think each place does great at their own thing.
Anyway, back to topic, I'm also pretty sure that Universal controls their own merchandise and Hasbro doesn't have theme park rights. Not 100% sure, but obviously you can see toys in the park without Hasbro labels.
Also, I would hate if they changed the Jurassic Park gates to Jurassic World gates. I think Jurassic World's box office performance will pale in comparison to its original counterpart and JP 1 will still be the most well-known and highly-regarded in the series after JW's release. I really don't think any changes to reflect JW will come except for maybe a few scant details in the expansion. I think the extent of JW's influence in the parks will simply be a little promotion here and there, just like every other big Universal release.