For the new season, the USFS assignments page has empty placeholder slots only for SLC.
ETA, see post #43 below for an update re USFS.
Skate Canada's assignments page has placeholder slots only for SLC, Nebelhorn, and its own new Autumn Classic. None for Finlandia, Nepela, etc.
(Coupe de Nice is not in the Challenger Series, but the others are.)