1990’s Back to the Future Part III closed out the trilogy, but what if there was a Part IV?

Luckily, we can imagine, thanks to this fan-made trailer recently uploaded to Youtube channel, Smasher.

The clip is comprised of footage of Michael J. Fox and Christopher Lloyd reprising the iconic roles of Marty McFly and Doc Brown over the past 10 years, including commercials with Toyota, Lego Dimensions, Garbarino, and Jimmy Kimmel Live.

Enjoy the “what if” moment above.