The epic battle returns October 6th, 2018. Challenges suggestions are now open. In order to get SMG4 to see it, send the suggestions in the tweet he posted about the whole thing.
In a dystopian, ruined Mushroom Kingdom, Mario and SMG4 climb out of the rubble and catch their breath. Suddenly, Mario starts attacking SMG4 against his own will and no control over his body, while SMG4 tries to defend himself. Then, the camera pans up, revealing that Mario and SMG4 are being controlled by Waluigi (though the scene shows his gloves holding a puppet cross with strings), who laughs evilly.
Then, the scene switches to the War of the Fat Italians 2018 logo, and the half-red, half-blue Mario cap on the shield changes to a yellow one with Waluigi’s nose and mustache, and his laughter can be heard again.
The video is well made entirely with Source Filmmaker. This is also the second WOTFI trailer has been used with SFM animation, the first one is either "A war is coming... #teamSMG4 or #teamMario" last year.
Waluigi controlling Mario and SMG4 in this trailer possibly hints at him replacing X as the judge.