I have not seen any announcement but I have noticed that hut fees for international visitors for next season are no longer double the NZ rate for the Milford track. Seems to be the same for the Routeburn and Kepler Huts and Abel Tasman campsites (which were also double).
Both Milford and Routeburn tracks have had their opening dates for bookings delayed due to damage from earlier this year - no exact date has yet been announced.
Huts
In the Great Walks season (27 October 2020 – 30 April 2021):
New Zealand citizens, those ordinarily resident in New Zealand*:
Adult (18+ years): $70 per person, per night
Child (17 years and under): free but booking still required
International visitors:
Adult (18+ years): $70 per person, per night
Child (17 years and under): $35 per person, per night
https://www.doc.govt.nz/parks-and-recre ... e-id-42122