It's a dream.
At the latest 8 months to a year before the expansion, they should drop a site with it's own forum.
Then drop a job each week with key points, direction, gameplay loop and action trailer(so we don't have a repeat of seraphism).
Picking up to a dozen (valid) points from the forum each day to elaborate on the choices/reasoning, and being open to changes for that job, with a poll for each.
Then a few weeks later update it based on the feedback - real actual feedback - and iterate until satisfactory feedback or time runs out (at witch point, the concerned jobs must be flagged as "to be reworked during expansion")
That site should stay up and continue to work and be updated "forever", at least every few months, even if the Q&A is paused between patches.