So, back on April 1, 2019, Sega and Sonic Team made a music video which the name is the same as the post's title.
The music video featured a song called "Danger Zone", which was an original song created by the executive producers of Sonic Generations. The song was also made on the same year and date this music video was released, and only 1 month was taken for this song to be finished, with a successful result.
The music video featured live action characters and a man in a Sonic mascot costume doing heavy metal music in numerous places. When I watched it I remember seeing a scene where the characters played the song at an abandoned construction site and at a skate park.
The video was meant to be an April Fools' joke, and was deleted a day after its' upload by Sega themselves.
Sadly, even though the video received 230,000,000 views before its deletion, it's lost forever.
Man, I remember seeing that video before it got taken down. It was wild, like nothing I'd ever expected from Sonic. The live-action metal vibe was so unlike Sega's usual style, but honestly, it was pretty cool. Wish someone had saved it.