Super Dragon Ball Heroes S04E01 - New Space-Time War! The Ultimate Fierce Battle Begins!

A mysterious figure looks out over the new universe's version of West City. Nearby, Goku has been attacked by Frieza and Meta Cooler. In the process, he is contacted by Xeno Trunks, who is at the Time Nest with Xeno Pan, Xeno Gohan, Xeno Goten, and the Supreme Kai of Time. Xeno Trunks informs Goku that what Fu has actually created is merely a copy of the Seventh Universe; interestingly, any damage inflicted on the buildings in the alternate West City is also transferred over to the real West City. Goku tries to find a way to escape, but he is tracked down and attacked again by Frieza and Cooler. However, Hearts appears and rescues him. Goku is shocked, but Hearts explains that Demigra pulled his spirit body out of Hell, and that he wants Goku to help him destroy Fu for misusing the Universe Seed. Goku and Hearts form a tentative alliance against Frieza and Cooler, who both transform into their Golden forms. Hearts battles Cooler, while Goku briefly taps into Ultra Instinct and uses its power to subdue Frieza. However, a mysterious masked Saiyan with hair similar to Goku's appears and implants two red Dark Dragon Balls into Frieza and Cooler, granting them a significant powerup.