The July 8 Disney Gallery event has been confirmed, and the information is supposed to be posted on disneygallery.com sometime this week.
The event will be from 9am to 12 noon at the Disney Gallery, above Pirates. Featured artists will be Robert Olszewski, Charles and Bruce Boyer and James Campbell.
Olszewski will be releasing the Disneyland marquee from the Main Street collection. There will be two different versions available (the only difference being the plaque) - a first edition Main Street and a limited edition of 1,000 for annual passholders. Also being released that day from Olszewski is the Beauty and the Beast piece from the Gallery of Light collection and the Nightmare Before Christmas - Holiday Doors Box from the Heirloom Box Collection.
Here's a picture of the marquee, here's a picture of the Beauty and the Beast piece and here's a picture of the Nightmare box.
I expect the official release will have more information about what will be available from the Boyers and Campbell as well as prices on everything.