I don't know if the Direct will really hold much we'll care about at this point. Sakurai had never said anything to begin with and if there was some Smash info, then I feel he would have at least tweeted by now.
We know of Civilization 6, a Yoshi Game, and FFXV Pocket whatever. We also know that the direct was supposed to contain 3DS content information. We already know that this will be a Switch exclusive game, so depending on the amount of 3DS stuff revealed; be it DLC to older stuff, coming DLC, or new games, that may be the entirety of the Direct.
People keep pining for the Direct as if its a certainty that Smash info was coming in it, but that was never the case. There have been times in the past where general directs held Smash info, but there was also a larger gap between Announcement of the game and its intended release date. This game was hinted at in March of this year and it wasn't until June, 6 months til release, that it was finally confirmed to be a new game rather than a port. Then our next bit of info didn't come until August; only 4 months before release! At this point, since Sakurai had said all characters will be revealed before release, I think there's a fair possibility that every info dump for this game will come from Smash-only Directs, so that the most time, info, and focus can be given to it due to the impending release date.
Some of you are starving for info, demanding this general Direct, but we may not get actual info until next week.