The roadmap should be on, or at least linked on, the core homepage. The url should be /roadmap. It should be graphical and easy to read for the average customer of the currency. It should be titled "roadmap" and it should explicitly state whether a hard fork is or isn't planned. If there is a HF planned it should have the size and the date. Otherwise it should state there is not plan yet.
This. Because no one else has posted any support, I will note that I agree here. The software is open source, but an ambiguous/hidden roadmap on a project of this size represents anything but the ideals of community and open source.
#2 3 words "bitcoin core roadmap" on a common search engine (guess which) result in these results as the first two links
Calling the roadmap "hidden" is hilarious.