As those who follow the mailing list may already know, we've decided to skip the 2017.4 release and focus on the release date in Feb instead (it's been just two months since the last release, there's been FSWeekend preparations for some of us, and there's a general feeling of 'not ready').
This would give
someone the chance to organize the poll for the next default airport - if nobody shows any interest, the developers will simply pick one.