If there's one thing the Avengers do well, it's assembling - and they're doing so in the first official Avengers: Age of Ultron poster.
Debuting on Marvel's Twitter page, the poster shows the full team from the original Avengers movie (complete with Nick Fury), but also shows the characters Quicksilver, the Scarlet Witch, and even an obscured Vision. Above them is a swarming army of Ultrons.
In addition to all the characters and actors shown in this official first poster, the text accompanying the poster also confirms the large number of supporting characters announced to appear -- including Don Cheadle as James "Rhodey" Rhodes, who interestingly gets a higher billing than Aaron Taylor-Johnson, Elizabeth Olsen and Paul Bettany despite them being featured on this image. In addition to Cheadle, advertised is Cobie Smulders as Maria Hill, Anthony Mackie as Sam Wilson (a.k.a. The Falcon), Hayley Atwell as Peggy Carter, Idris Elba as Heimdall and Stellan Skarsgård as Dr. Erik Selvig.