On Marvel Earth, Spider-Man joins forces with the Avengers to battle Doctor Doom in New York City, but when several civilians are killed in a building collapse as a result, Spider-Man becomes demoralized and finds himself whisked away in a strange spacecraft called the Interdimensional Train. Doctor Doom stows aboard and both find themselves in the Tokyo of the Ultraman universe! Witnessing Ultraman battle a giant Kaiju, Doom craves the Giant of Light’s power and joins forces with Alien Mefilas and his army of Kaiju from the Monster Graveyard to steal it.
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(Source: Tsuburaya Productions)

A high school student named Yu Komori is bitten by a radioactive spider, which gave him spider-like powers. 

High School outcast and Spider-Man fan Yuu leads a life of unfulfilled expectations. But after finding the Legendary Webslinger's suit in an alley, his life makes a big change! What could be lying in store for this aspiring young lad!

In the year 200X, a supervillain who goes by the name Lord Gokibu wants to steal the fossil of the Insect King, 15 year-old Shou Amano uses his new spider powers to become Spider-Man J, to prevent this from happening. During his time as a superhero, he meets Japanese versions of Elektra, Dr. Doom, Blade, and the Fantastic Four.

Ages ever since the absents of the Gigantic Hero, the next generation hero who inherit the bloodlines of the legendary gigantic hero emerge. Shin Jiro, a normal high school student who's also the son of Shin Hayate(the real Ultraman) and is aware about the existence of Ultraman years ago and wanted to be a hero that save the world. He is just a normal human and had no superpowers or such. One faithful day lead him to a special high-tech suit that will turn him into a different incarnation of the legendary gigantic hero! Will he be a HERO?

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