An opening of nearly every epic legendary pokemon introduced! :O (That is, discluding the Regis, Suicune and Raikou, Cresselia, Phione, and Heatran)
Also you can tell it spoils Monferno evolving into Infernape and Grotle evolving into Torterra. It also seems to spoil Dawn capturing a Togekiss. Doesn't seem that Gible, Buizel, Buneary, or Croagunk will evolve this series.
I do happen to wonder though what the pokemon or whatever that thing is in the pane where Zapdos is passing.