Okay, so after reading all the posts in this thread and everyones theories, I gotta say, I'm disappointed. I mean, really? Half of what everything has been said is just things you'd find out by playing the game or by looking at serebii the day after the release. Starter evolutions, Mewtwo having a second new form, another eeveeultion, this being the last game, the entire Pokedex? How does any of that qualify as "scoop of the century"? We will find out the starters evolutions within like 3 hours of gameplay. If Mewtwo has a second form, what is so big about that? To be the biggest thing for Pokemon in the comming century? No. This isn't the last game. There is a thread all about that and if you look at it for two seconds, you'll know, this is not the end. If it was we'd have found out earlier. Another eeveelution wouldn't be century worthy either, and neither would a second new type. And we will not get the entire Pokedex. No offense, but that is a little dumb. To show off literally every new Pokemon and the reurning ones before release will not happen. Ever. That completely spoils half of the fun of a new generation. Finding the new Pokemon and experiencing them for ourselves for the first time.
Unless this news is going to be anti-climactic, none of these theories are happening.