The freshly revealed brick-built BB-8 has been confirmed as the next Star Wars Day promotion!
Though the celebration starts on May 4th and goes through to the 6th, 40288 Mini BB-8 is only available on the 4th and comes free with a $75 (or more) purchase of currently available LEGO Star Wars products.
This offer is only being run through shop.lego.com and the official Brand Stores, and will not be available at Discovery Centres or LEGOLAND Parks. Whether this offer will be run in Certified Stores is unknown.
On top of this - and presumably running through the entire event - is double VIP points on LEGO Star Wars products and 20% off selected LEGO Star Wars sets.