you can look up nav's reddit or the nav coin website for the upcoming launches. but from experience, the dev team doesnt give any fixed dates, they work on it and once they finish it, they will launch it. its usually a period/estimate. next up will be the DApps whitepaper & progress on polymorph. marketing will also be ramping up with their roadmap. most prob in q1, if not early q2. but im certain a lot of other side events such as the community fund and community proposals will start to kick in and things will start moving real fast in 2018. weekly updates on wednesdays so keep on the lookout for it.