I've just counted the number of cards in Dragon Storm. Excluding Secret Rares, they are only 53 right? If you include the secret rares, then the number of cards in the set means that Kangaskhan, Dunsparce and Ho-Oh may very well be in this set along with the others from Champion Road that were excluded from Celestial Storm like Blaziken (not the GX version); that's if the secret rares begin after the number in the set (in this scenario 70), as just like Shining Legends, Dragon Majesty is also a Holiday set.