Naruto: the black dragon emperor

When Naruto and Sasuke are about to seal Kaguya, she is in her last moment and manages to create a portal to another dimension that absorbs the blond Uzumaki, thus saving herself from the seal, but she never expected Hagoromo to appear again and with the help of a very injured Sasuke, they would manage to seal her again, although the young Uchiha died from consuming too much chakra. While that happens, Naruto is in a space between dimensions and doesn't know what to do to get out of there until Hagoromo appears in front of him, but he is not the only one in this place.