"We'll reveal details as soon as the team is comfortable it is locked and complete. Hopefully next week," Priestly said.
BioWare last month released two new "teaser" images believed to be for upcoming Mass Effect 3 downloadable content. The content is rumored to be a significant expansion.
In December, BioWare teased the next single-player expansion for Mass Effect 3, saying it will be "all hands on deck for this one." Additionally, Mass Effect chief composer Sam Hulick has revealed he will contribute to the new content after no involvement with the game's Leviathan and Omega DLC.
Also set to make a return for the mystery content is film and voice actor Seth Green (Family Guy, Austin Powers). Green has performed the voice of Normandy pilot Joker since the series first took flight.