With the recent news that MP-17 would be Prowl and MP-18 would be Smokescreen, it seemed inevitable that the third of the Autobot Datsun Fairlady Z trio would get the Masterpiece treatment sooner or later, and the answer is: sooner! September 2013 will see the third Masterpiece release in as many months with MP-19 Bluestreak getting released that month. Like Prowl and Smokescreen, he's retailing for in the region of $79.99.
The only question that remains of course is which variant of Bluestreak shall it be, a toy accurate Silverstreak, an animation colors black roofed Bluestreak, or the more-likely-to-be-an-EHobby-release blue Bluestreak? Time and Japanese hobby magazine scans will tell.
In the mean time, please check out the preorder links for MP-19:
Big Bad Toy Store