Could dragon balls bring the universes back? In Dragon Ball Super, a giant tournament between the most powerful fighters of eight different universes is currently happening. The seven universes to lose will be erased by the God of all universes.

If that happens, could dragonballs possibly save the erased universes ?
The universal super dragon balls can revive the universes yes. As it was said during their first encounter that this Shenron was powerfull enough to grant "any" wish. 

However I doubt that the Super Shenron would go against Zen-oh as he would be at the risk of being erased. This is my personal thought, but based on the fear of the earth Shenron towards Beerus I can asume that Omega Shenron has the same fear towards Zen-oh. Due to this he most likely would refuse to grant the wish.