I found this on intercot west, posted by mufasa who evidently works for disney...
The actual weekend leading up to the grand opening will mark several adjustments to operations in Tomorrowland. Innoventions that weekend will be closed (starting June 9th), the Jedi Training Academy shows won't begin until 1pm on the 11th (no shows scheduled over the weekend) and entry into Tomorrowland itself for attractions like Space Mountain will be from the main Tomorrowland/hub entrance side (on the 9th and 10th, the back pathway behind the Matterhorn between Tomorrowland and Fantasyland will be blocked off).
Tomorrowland Terrace and the Tomorrowland Train Station are also expected to be closed for the weekend.
Autopia will be closed that weekend as well, although there is the possibility it may resume operations on the afternoon of the 11th.
On the 11th, the attraction will not open to the public until 11AM- the current plan is to start the line for the attraction in the morning somewhere near the Matterhorn entrance and at 11AM a group of CMs will then walk the line up to the Finding Nemo attraction entrance, since there is a press event at 10am to mark the official re-launch of the submarines.
I believe the 11th also counts as an early entry morning- there will not be entrance into Tomorrowland scheduled as part of early entry that morning (as far as the current plans that I'm aware of)
Also, effective immediately- Monorail Purple is not in operation which means they are only running Monorail Red on about 15 minute departures (in the morning the Downtown Disney monorail entrance may be restricted to Disneyland Resort Hotel guests only).