If they really keep a lid on this thing until the earliest screenings Friday morning it might make sense to just upload it right then.
The Jurassic World trailer is airing Thursday night and, I'm guessing, will be officially uploaded in order to avoid losing hits to people uploading it from their DVR's.
Unless Disney really truly doesn't care about what will surely be multiple people uploading cellphone recordings of the trailer starting Friday, they'll officially upload it as well. It kind of defies the point of only putting it in these 100 theaters if it's gonna be everywhere, though.