From the SHH boards:

Here's the rundown on most of the new costumes for CW. A good chunk of this hasn't been made public yet, but Badass Digest did break the scoop on some of these. We should start seeing the new looks when set photos start coming out.

Cap - Modified AoU suit, much simpler and cleaner than AoU design, sits somewhere between the stealth and AoU suits. Those who think the AoU suit is overdesigned will like this new version. Compared to AoU, they got rid of a lot of the red highlights as well as the white on the biceps. The arms do have a red line going across where the bicep meets the shoulder. The rest of the suit is a direct carryover from AoU, including Avengers logo, arm magnets, and gaiters.

Iron Man - Yep there will be a Mk46. It's essentially a modified Mk45 but with a few key changes - more gold in the torso and arms to break up the all the 45's red, smoother faceplate design (similar to the Mk3-7 helmets), and last but not least, an inverted trapezoid cutout over the round chest RT. The 45 has a hexagon cutout btw.

Black Panther - Not much change to the already revealed concept art. The suit is generally fabric throughout, with the mask being metal or some other hard material. The necklace is still there. I did get to see some early CGI work showing BP's movements. They pretty much nailed it, very acrobatic and animal-like, not quite the acrobat as Spider-Man, you can definitely tell BP's carrying more weight than Spidey as he moves around.

Falcon - Very dark costume overall, mostly dark gray with some red. Kinda reminds me of Wolvie's DOFP future costume, also has a mix of hard armor components and fabric. Wings look pretty much the same as TWS.

Ant-Man - Yes he'll be in the movie, presumably it's Lang and not Pym. Also will have Giant-Man ability. Badass Digest already broke this. Couldn't really tell if he gets a new suit, looked pretty much the same, but the new ability is most definite.

War Machine - This one is baffling to me. I've seen concept art of WM fighting Falcon where he's wearing what appears to be a new suit, but I've seen other standalone concept art for WM where it's the Mk2 suit from IM3/AoU. Guess we'll just have to wait and see.

Crossbones - We will see Rumlow in full costume, looks very Stevenson Punisher-esque. Black tactical gear with crossbones graffiti painted on his vest and skull design on his mask (couldn't tell if mask was a helmet or fabric). I'd say it looks pretty true to the comic look.