On the company's official forums, series designer Jos Hendriks revealed that the next DLC features eight writers, bringing together writers from all of the previous DLC packs.
"It's all hands on deck for this one. Pretty much every ME3 DLC writer here in Edmonton is involved (which would include both Patrick Weekes and John Dombrow)," Hendriks said.
The team also includes Mac Walters, who was lead writer from the main Mass Effect 3 story.
Later, Mass Effect 3 composer Sam Hulick tweeted that he is also working on new music for the DLC, and that he expects it to be an emotional experience.
"Tossing in piano and muted strings for this one particular piece. High potential for tears," Hulick said.
Gallery - 'Mass Effect 3' character screenshots:
BioWare recently released the Omega DLC for Mass Effect 3, which let players take back the titular space station after it had fallen under Cerberus control.
Meanwhile, BioWare is starting work on Mass Effect 4, with producer Casey Hudson reaching out to fans for their feedback.
> Read Digital Spy's review of 'Mass Effect 3'
Watch the trailer for Mass Effect 3's Omega DLC below: