Here's an idea that at least a few people have thought about before me. The idea is improbable and most likely impossible. Here it is, Earthbound: The Movie. Just think about it, Ness on the big screen. It would be spectacular.

The movie can be in three parts (like Back to the Future) because the game covers a lot of events. The first part would start in Ness's house and end in the Dusty Dunes Desert where they are in the traffic jam. The second part would pick up from there and end in Scaraba when Ness, Jeff, and Paula are leaving in the yellow submarine. The third part would show the rest ending in Pokey's letter.