roadmaps are nice to have, but are also problematic.
if you have one, and its open to the public, that public tends to get rather.. angry if the company doesn't stick to it. or deviates from it.
They did at one point have one. and that's exactly what happened.
its also not the first game company i seen that had a roadmap, and then later ditched it when they found out they couldn't keep to it and it was causing a rift between their customer base when they didn't stick to it.
so i highly doubt they will make the same mistake again and create another roadmap.

but keep watching the news section. they will post any information there when they are ready.