At Comic-Con 2014 the team at Nerd Repository was able to interview Corey Stoll, who will play Darren Cross, aka Yellowjacket, in Ant-Man. Stoll talks about Yellowjacket's battle suit and how the design process is progressing.
Stoll on his suit:
“I’ve had several costume fittings and it’s looking amazing. It’s still in flux, they’re still figuring out exactly how it’s going to look, but it’s going to be awesome… In this story Darren Cross, who was in the comic books but was not Yellowjacket in the comic books, he has a suit that is sort of the next generation of Ant-Man’s suit. It can do everything that Ant-Man can do, but more. It’s more badass, more militaristic, sleeker… sort of like if Apple had designed a battle suit.”
If you're more of a watcher than a reader, I've included the video of the interview. Ant-Man will breach the box office on July 17, 2015 (USA).