Pretty much. At this point, I'd recommend holding off a couple of weeks on starting a new Association or My Player, when there'll be an official roster update with rookies.
They've said there'll be more frequent updates, I expect there might be at least a couple during the brief offseason to add the rookies as they sign contracts and move players around as necessary. When the rosters are finalised for opening night (December 25th), there should be an update around about that time.