The Back to the Future ride that used to be at Universal Studios actually showcased what could become very compelling gameplay through it's storyline: 1985 Biff stole a Delorean and you have to chase him through time, essentially.
While I don't think they'll be able to match the "See life through your parent's eyes" story that was so compelling through the first part, it has potential to be good fun.
Jurassic Park, though, that I'm not sure about.