Yup. The fact that so many in the Jurassic World audience was over 25 suggests that nostalgia played a big part in its success. That's def going to work in Star War's favor too. Big time.
But...for my part, I was planning to see SW, but then I saw that teaser with Harrison Ford. And...frankly...it's silly, but I don't know that I want to see Han Solo as a gray-haired old man. For one thing, you'd think, in a future with faster-than-light space travel and other marvels, that scientists in that time would have found a cure for aging. Heck, we're on the cusp of it now, from what I've been reading. Seeing Ford as Solo kind of took me right out of the spirit of the thing. And it seemed weird, too, that while Han's gone gray, Chewbacca looks just the same. Okay, maybe Wookiees age more slowly, but...I don't know. Seeing that trailer was kind of depressing. I realize that's not the general reaction, so yeah, the first Disney-backed SW film will be huge. But that universe far far away will never be the same...