These pics may be a bit big, but here's some gorgeous concept art for the Avengers film, including a first look at the design changes for Black Widow's costume, Hulk, Cap's costume, first proper look at Hawkeye and How I Met Your Mother's Cobie Smulders as S.H.I.E.L.D Agent Maria Hill.  
 More streamlined than Iron Man 2:
	
	
		
		
	
	
For some reason this pic is of the costume from the beginning of Iron Man 2:
	
	
		
		
	
	
New Hulk, now looking more Mark Ruffalo-y:
	
	
		
		
	
	
New Cap costume, more simplistic than the one he wears in THIS WEEK'S FILM:
	
	
		
		
	
	
Thor, looking pretty much the same, although I'm sure his costume gets a bit altered too:
	
	
		
		
	
	
First look at Jeremy Renner's Hawkeye, also featuring the Hellicarrier in the background
 
More streamlined than Iron Man 2:
	
	
		
		
	
	
For some reason this pic is of the costume from the beginning of Iron Man 2:
	
	
		
		
	
	
New Hulk, now looking more Mark Ruffalo-y:
	
	
		
		
	
	
New Cap costume, more simplistic than the one he wears in THIS WEEK'S FILM:
	
	
		
		
	
	
Thor, looking pretty much the same, although I'm sure his costume gets a bit altered too:
	
	
		
		
	
	
First look at Jeremy Renner's Hawkeye, also featuring the Hellicarrier in the background   :
	
	
		
		
	
	
S.H.I.E.L.D. Agents, Nick Fury, Coulson and Maia Hill:
	
	
		
		
	
	
And when you stick them all together you get:
  :
	
	
		
		
	
	
S.H.I.E.L.D. Agents, Nick Fury, Coulson and Maia Hill:
	
	
		
		
	
	
And when you stick them all together you get:
	
	
		
		
	
	
	
	
		
		
	
	
What do y'all think?  

   8)