After a leak of the international version of the first Avengers:  Age of Ultron trailer spoiled Marvel’s plans to premiere it during Marvel's Agents of S.H.I.E.L.D., Marvel has officially released the trailer and poster for the film. 

Marvel tweeted "Dammit Hydra" to express its feelings on the matter.

Shooting wrapped in August (see "'Avengers 2' Filming Wraps").  The film will release May 1, 2015.