Unfrozen is developing and Hooded Horse is publishing. Ubisoft is still the IP owner and co-publisher of the Heroes franchise, but very much hands off on this title - which is great.
here is a Q&A from 10 months ago where it says "Ubisoft will remain involved as the holder of the Heroes IP, and continue to fully support the project." - whatever that means.
just wanted to share that this OG Ubisoft banger IP has a new release in early access which is so far well received, and Ubisoft does not play a major role in developing nor publishing.