It's probably fake. I saw a lot of Devastator giftsets in Singapore during my June visit and since there is no official Encore news on it, this is probably fake.

(and as said in another post somewhere, I saw fakes of all 5 Dinobots, Wheeljack, Gnaw, Scourge and Reflector too. All in US boxes. You just don't find many people willing to part easily with any of the above, MISB, for around $100 a pop, so I'm thinking it can't be real).