I have this trailer in my mind where we see a green open field with the Monado (basically, it's the game's title screen). The
main theme to Xenoblade is playing in the background for a few seconds. Then it cuts as Shulk gets a vision of Bowser attacking him. Shulk sees Bowser and uses Monado Buster on him.
The screen splashes with "Shulk Engages the Enemy!" and
You Will Know Our Names is playing in the background. Just like the Palutena and Robin trailers, the party members in Xenoblade explain all of Shulk's mechanics in Smash since Xenoblade is dialogue heavy like Kid Icarus: Uprising and Fire Emblem: Awakening. The middle of the trailer has Shulk using his Monado Arts while the ending showcases a Chain Attack Final Smash. Shulk then swings his sword and says, "Behold the power of the Monado!"
The game's logo comes up and the trailer ends with Shulk putting the Monado down saying "Piece of cake!"