All the closures are for the 2 day media event that is taking place for 7DMT. They will also be doing some other things other than getting the preview of the ride which is why other locations (besides NFL) are closed.
The rich and famous get to ride 7D first! lol I bet money it's all the execs. And if tomorrowland is in the near future for clean up. They may be riding to determine what needs done with no guests there. That would be really cool if it was.
If it's a media event, the execs should be involved. After all, it's their park. Since everyone complains that the suits aren't involved enough with the parks, here's a good way to get them back in.
I'm going to go up there and make a poster to hold up and urge them to replace the Tomorrowland Speedway cars with Cars themed vehicles. Surely that would be an easy and cheap fix to that sad attraction!