A month contains between 20 and 23 posts; 20 would be for a February with the first day being a Saturday, and 23 would be for a 31 day month with the first day being Monday. So we know that there are more than 20-23 characters in the game which we can combine with our current knowledge of 24 characters to learn nothing. It would, in fact, take him over a month to make a picture a day for each of the currently revealed characters' final smashes. Due to the fact that two months in a row can't start on Monday, the most possible posts in two consecutive months is 45 so if you believe this posts suggests it would not take him more than 2 months to reveal all of the characters, that would cap the roster size at 45 characters with unique final smashes (which makes Pokemon Trainer one character, notably). While that's probably realistic, I somehow doubt that even if it were slightly more that Sakurai would actually give it away like that since it's still strictly true that even to reveal 100 final smashes would take over a month. I somehow even doubt Sakurai looked into this very deeply at all.
I do find it interesting that basically everything is much brighter and more colorful in the new game, but the smash ball is now a lot darker. I also don't think there's really any meaning to take from that either, but it's interesting. Hopefully we don't see too many more pictures related to smash balls between now and release, right?
