Well, it's for those who weren't caught up, an easy way to reveal everything else in the little time they have left before release, and also the best way to showcase it all. I mean, there would be some uninterested in Smash Tour but interested in 8-Player Smash, plus the way they start off with good stuff then go back to basic stuff people assumed + more detail and info, then add a few more good things, it makes it more likely for people to watch all the way through due to those random little big things they added in between the not so amazing news ones. I mean, really think about it. If they only showed all new stuff and didn't mention any of the returning updated stuff or new features, or if they simply had all the big things only at the beginning, do you really think you would've watched all the way through and seen Mewtwo?