None of this information is new and I bet most of you have come down to this conclusion, but I might as well say this anyway.
I see the next two months taking a few options. We have one to two more announcements. Either in October or November or both. One of these will be a direct so that they can show off whatever Spirits mode is and more. The possible other is a single character trailer. Seeing how things are going with the whole Smash Youtube listing and stuff, we will likely have two more announcements. I can only see 1 to 3 more newcomers being announced(excluding echoes). If there is only a direct left, there are 1 to 2 more characters left, and if there are is one announcement trailer and direct, 2 to 3. This is because Sakurai tends to only showcase a trailer at the beginning or the end of a direct. Incineroar is pretty much confirmed to take one of those spots, so we have the possibility of having no more newcomers to two more remaining after it.