German Space Agency spinoff company Polaris Raumflugzeuge has joined the NATO STO working group "hypersonic aircraft" as coordinator for this new group. Sounds like more than it is. The STO working groups are basically research groups addressing typically certain clusters of issues, and there have been dozens such working groups with regard to hypersonic systems over the last 15-20 years at STO. Usually their titles tend to be less generic than in this case though.
The company is currently under contract to develop a demonstrator for a long-range, large hypersonic reconnaissance drone for the German military with planned first flights end of the year.
Subsequently to joining that working group, Polaris just removed all subpages regarding technology, roadmap or business plans from its website. Which is somewhat "odd" and likely somewhat related, given their website is mostly intended to attract third-party funding.