[New Generation] Ascension of the Universe

An energy source of unknown origin drives the evolution of the universe. Yet throughout this process, forces from beyond the universe continually try to interfere. Ultra Warriors and cosmic organizations from different eras investigate and pursue the truth.

The story takes place in a multiverse and is not limited to Earth. In this setting, all the universes in which Ultraman has appeared form a single multiverse system. At first, the universes had almost no connection to one another, and crossing between them required enormous amounts of energy. After Saga appeared, those connections began to grow stronger, until the universes were eventually linked and large-scale inter-universe cooperation and exchanges became possible.

This story also takes some liberties with canon. In addition to Ultraman, it features the concept of Outer Gods. They are not the Outer Gods of the Cthulhu Mythos, but powerful beings who operate beyond the multiverse. They cannot easily enter the universes, and they are neither good nor evil.

As for Taiga, I consider the stage shows part of the official story, so Yuki has the Taiga Spark. The three Ultras also make time to chat when they can, and get together in their free time.

Tiga, Dyna, Gaia, Agul, Trigger, and Decker all exist in the same universe. The reason will be explained. This is not the "all Heisei Ultras are one family" setting, but since they all live on the same disaster-prone Earth, they get along well.

The potential pairings include Aikuu, Gayu, Dezuo, Gaowu, Zeyao, Saijie, Ximeng, Tengmeng, Keyou, Kaiga, Taizuo, and Zhoujian. I'm also fine with Xiangguang and Xiangwo. They may not all appear in the story, but consider this a heads-up in advance.