Well seeing as Xenoblade is out in Japan already and Yoshi is out the following week in Europe, it won't be "all" new, but yeah.
Basically, in my view, if it was in the Direct last week, it won't be in it. If it was in the Smash Direct tomorrow, it won't be in it. If it was revealed or detailed in the past two weeks, it won't be in it.
Now, this does add a bit of iffy stuff. Fire Emblem and Yoshi were in the Japanese Direct, but not the US one which makes me wonder and I do truly hope they don't spend too much time on Xenoblade considering it is out already in Japan and this Digital Event is a global thing, not US only.