'Super Smash Bros. Ultimate' for Switch is rumoured to be getting a Stage Builder mode.

Super Smash Bros. Ultimate

Super Smash Bros. Ultimate

Nintendo Direct are due to make an official announcement on the game at a briefing tomorrow (11.04.19), where they could be about to confirm the mode which they appeared to accidentally show in a recent video teaser for the title for the hand-held console.

AllSourceGaming noticed that the Stage Builder menu option was on a blurred out TV in the back of the 30-second clip.

Towards the end of last year, the video game giant had to try and remove a number of spoilers from the internet after early copies of the title were leaked.

Before its release on Switch in March 2017, 'Ultimate' had the best pre-selling game for the console ever.

In a tweet from Nintendo Versus, they said: "Super #SmashBrosUltimate is punching its way into the record books! Thank you to all the amazing fans for your support in making this a fight for the ages! Be sure to have your #NintendoSwitch ready to experience the action when the game launches on 12/7. (sic)"