I just got a trailer idea :D
It all starts out like this...
The video starts off near a familiar bridge that us Bronados know of, all the creatures seem happy in their natural habitat...when suddenly...
Wario blazes down that bridge on his motorcycle (which confirms him to return)! But, he gets distracted by a shiny green light in the distance, and crashes into a barrier (dammit, he pulled a Juju), and continues on foot.
He eventually runs into Ness (which confirms Ness to return), who is confronted by a faced Mechon. Both of them team up to try to take it down, but it's no use...As the Mechon is about to make a mess out of the duo...
"Monado---Buster!"
Shulk appears and destroys the Mechon,saving Wario, Ness, and claiming his place in Smash Bros!
Suddenly...
"ooya!" Ganondorf breaks out of the Mechon corpse and draws his sword, and challenges Shulk to a duel! (and confirms Ganon to return)
As the duel goes by, Wario and Ness see a purple ball of energy fly by towards Shulk. Wario and Ness warn him, but by the time they signaled, he already dodged it and it hits Ganon...he turns around and sees a floating armored figure...
Ness sneaks a PK Flash at the enemy and its armor breaks...and we hear a familiar cry...
The armor falls off, and Mewtwo appears! (and confirms his return to Smash Bros).
From there, there's gameplay of everyone, while all of us viewers are freaking out because most of our wanted characters are confirmed to return.
At the end of the video, Reyn sees the battle, and runs down there and says "Yeah! Reyn time!" to assist Shulk in the end.
Wish this could actually happen. XD