Disney California Adventure has announced that they will celebrate the Grand Opening of Shanghai Disneyland on 6/16/16:

Quote Originally Posted by Disney Parks & Resorts

... On Thursday, June 16, join us in Hollywood Land at Disney California Adventure park from 10 a.m. to 5 p.m. and enjoy special entertainment and photo opportunities in honor of the opening of our newest world-class Disney destination. The festivities will feature colorful performances by local community groups, along with character appearances by Mulan and Mushu! Some favorite Asian-inspired food & beverage offerings, including pork bao, almond cookies and pot stickers, will also be available for purchase.

In addition, we’ll be giving away a button commemorating the opening of Shanghai Disney Resort to each guest entering the Disneyland Resort theme parks, while supplies last ...