Mighty Thor: Battle Royale
Japanese title: マイティ・ソー バトルロイヤル
Alternative titles: Thor: Ragnarok
Type: ONA
Source: Other
Episodes: 1
Status: Finished Airing
Aired: Oct 29, 2017
Duration: 2 min
Rating: G - All Ages
Genres: Fantasy
Themes: Parody

In an alternate Azeroth, Thor and Loki have decidedly more Japanese names and face Ohera-san's (Hela) destructive wrath in what looks like ancient Japan. In reality, it's a silly short to promote the release of Thor: Ragnarok, titled Mighty Thor: Battle Royale in Japan. 

(Source: ANN)