Speaking with Chair Entertainment's co-founder, Donald Mustard, I was curious about their future plans, for "Shadow Complex" but also for their next game. Turns out there's not much going on in terms of "Shadow Complex" DLC, but their next project has already jumped into the design phase:
"We're definitely working on...things. I'm just not going to tell you what it is...we're still evaluating in the design phase."
In terms of a time frame and a platform for said project, not a whole lot to report, but Mustard isn't willing to write off the possibility that their next game may come to a platform other than the 360.
You can listen to a chunk from the interview above.